With properly applied protection, the risk of possible pregnancy is minimal. Non-hormonal methods such as condoms are the least effective (up to 98% effectiveness). We wrote about contraceptive methods in the summary:

https://www.gdziepolek.pl/kategorie/antykoncepcja

Pregnancy tests indicate that you are not pregnant and there is no need for additional tests. We wrote about the fastest time to take a pregnancy test in the article:

https://www.gdziepolek.pl/artykuly/test-ciazowy-jaki-wybrac-i-kiedy-zrobic

Perhaps symptoms such as abdominal pain, nausea, indicate a gastrointestinal infection. They can also have a stressful background. If they persist, I encourage you to consult a doctor. You can also take advantage of teleconsultation, e.g. via the Gdziepolek.pl portal:

https://www.gdziepolek.pl/telekonsultacja

To @Agata:

Yes, the line would be clear.

Would the test show a clear second line 30 days after intercourse? I'm afraid I might not notice it. The last intercourse was in a condom and I have a contraceptive implant

For @Olka beans:

Tests indicate no pregnancy. After such a time, the results are reliable.

Hey

It's been 19 days after the protected intercourse (but I'm not sure if the condom didn't break) I did a test - negative, on the day I did the second one also negative, the period is a week late, does it mean that I'm pregnant?

Yes, a test performed on these days from morning urine will give a reliable result.

Is the super-sensitive test 10 and 11 days after intercourse with morning urine reliable?

To @Aneta:

Yes, the test performed after such a time (10-14 days after intercourse) should already give a reliable result. The most reliable result is obtained after the test is performed on the day of the planned menstrual period. If the tests are negative, you can rule out pregnancy.

Does a test performed 11, 12 and 13 days after intercourse from morning urine (ultrasensitive) already give a 100% reliable result? Should I still worry that the 2nd line may still appear

To @Maro:

Based on the results of blood and urine pregnancy tests, which show <2.0 and <0.5 mIU/ml hCG, pregnancy can be ruled out, especially after multiple tests at appropriate intervals. Condom-protected intercourse further minimizes the risk.

Amenorrhea after childbirth, especially if you are breastfeeding, is normal due to the action of hormones that inhibit ovulation. Back and lower abdominal pain can result from postpartum changes in the body, but if they are worrying, please consult your doctor.

Can I already rule out pregnancy by performing blood tests 16, 23 and 30 days after protected intercourse with a condom result of <2.0 and one result of <0.5 and negative urine tests?
I will add that I have not yet got my period after childbirth? I have back and lower abdominal pain all the time

To @Maro:

If the result of beta-hCG (chorionic gonadotropin) from the blood after 26 days after protected intercourse is below 0.5, pregnancy is excluded. Beta-hCG is a very sensitive indicator of pregnancy, and after such a time after intercourse, its level should be significantly higher if conception has occurred.

Your symptoms, such as lower abdominal pain, back pain, nausea and malaise, can be related to many other factors. They may be due to the action of contraceptive hormones (Contraceptive tables can affect the digestive system and cause abdominal pain) or impending bleeding (related to the cycle or the effect of the pill). The impact of stress and anxiety can also exacerbate these symptoms, especially if you're worried about pregnancy.

Or it could be that I feel unwell, have lower abdominal pain, back pain and I feel sick, and the beta blood results after 26 days from protected intercourse are below 0.5, or maybe it's pregnancy?

I don't know if I'm not already telling myself...
What could be the reason for this?

To @Maro:

Yes.

And if the blood test was performed 26 days after intercourse, can I already consider it reliable?

To @Maro:

Yes, this means no pregnancy.

And does beta <0.5 with a reference range of 0-3.1 indicate that you are not pregnant?

To @Maro:

If a pregnancy test from morning urine performed 23 days after protected intercourse came out negative, the result can be considered reliable. Also, the result of a beta-hCG blood test, performed 16 days after intercourse, should be sufficient to rule out pregnancy. It can take several weeks to a few months for menstruation to return after giving birth and finishing breastfeeding, as the hormones need to stabilize. If you have doubts, I recommend talking to a gynaecologist who can assess your situation and dispel your fears.

And when I did a morning urine test again 23 days after intercourse with protection, did it come out negative, or can I consider that there is no pregnancy? Should I repeat the beta from blood, even though I did it 16 days after intercourse? I will add that I don't know what phase of the cycle I am in, because my period has not yet returned after childbirth.
I don't know if he's not going crazy anymore. When can menstruation occur after breastfeeding?

In this case, there is no need to repeat the HCG beta test.

Negative beta hCG test results, taken 16 and 18 days after sex, are consistent and indicate no pregnancy, as beta hCG levels should be above 5 mIU/mL to confirm pregnancy.

And if I did a beta blood test 16 days after intercourse and it is negative, can I rule out pregnancy by combining it with this test after 18 days, which is also negative, or is it even better to go for a blood beta again?

Increased body temperature and lower abdominal pain can be related to various factors, including stress or hormonal changes. Stress can affect hormonal balance, which in turn can lead to symptoms such as abdominal pain or changes in body temperature.

If the pregnancy test you took 18 days after intercourse was negative, it is normal, especially if the test was performed under appropriate conditions (e.g. from morning urine) and according to the instructions.

If you still have doubts about the possibility of pregnancy or experience worrying symptoms, it is recommended to test the level of beta-hCG from the blood. This test is more reliable and allows you to unequivocally confirm or exclude pregnancy. In the case of persistent symptoms, such as lower abdominal pain and increased temperature, it is also worth consulting a doctor.