Is a pregnancy test taken 21 days after intercourse reliable?

To @Miska:

A negative pregnancy test after such a time allows you to rule out a possible pregnancy. You can read more about pregnancy tests in the article:

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

But pregnancy can be ruled out after such a time after 15 weeks after intercourse

To @Miska:

You should see a gynecologist. Without testing, it is difficult to determine what may be causing the irregular bleeding. Many factors may affect the occurrence of menstrual disorders, e.g. stress, intense physical exertion, excessive weight loss, PCOS, thyroid disease or the use of certain medications (e.g. antidepressants, sleeping pills, hypertension medications, glucocorticoids, antibiotics). I encourage you to read the article: https://www.gdziepolek.pl/kategorie/leki-na-zaburzenia-miesiaczkowania

But my period is late and I don't know what to do. My period is not regular, but I had previous bleeding from intercourse earlier than it was predicted in the calendar and now I don't know what to think

Do @Miska:

Może Pani wykluczyć ciążę - nie trzeba powtarzać testu.

Good morning, I wanted to ask about beta HCG, I did it after 11 weeks and 15 weeks, result 0.2, there were four bleeds, from now on I should get my period, it is four days late and I do not know what to do, should I repeat the beta?

To @Miska:

After 15 weeks of intercourse, your beta-hCG levels would certainly be higher if you were pregnant. Pregnancy can be ruled out.

Beta hcg test taken 15 weeks after intercourse result <0.2 czy jeśli ciąża była by to już teta dodatnia będzie po takim czasie dodam że miesiączki są nieregularne

To @Majaaa:

Yes, you can rule out pregnancy.

Good morning. 12 days after intercourse I did a beta test, the blood came out 0.2 mlu, 18 days later I took a test from the pharmacy, it came out negative to be sure, on the 20th day I repeated it, it came out negative, can I be sure of the result or do I still have to repeat?