On the 3rd day of menstruation I had sex, 12 days passed and then I started bleeding again (I did two pregnancy tests after these 12 days) - is pregnancy possible despite a negative test?

Bleeding (or more spotting) in the middle of the cycle may be associated with ovulation, which usually falls on this date. If you observe a significant blood flow, this is an indication for a visit to a gynecologist. The cause may be hormonal disorders or gynecological diseases requiring medical consultation. Not all pregnancy tests have a high enough sensitivity to show the presence of pregnancy after 12 days. The test should be done from the first urine in the morning. More information can be found in the article below: https://www.gdziepolek.pl/artykuly/test-ciazowy-jaki-wybrac-i-kiedy-zrobic The selected test can be ordered on our website with home delivery or collection at a pharmacy, e.g.: https://www.gdziepolek.pl/produkty/8584/babycheck-1-wb-test-ciazowy-z-krwi-test/apteki