Why did the pregnancy test show a positive result after 15 minutes?

To @slodkakalina:
Everything indicates that you are not pregnant. Spotting and bleeding may indicate an impending period or cystitis that has not been fully treated. If urinary discomfort returns, consult your doctor. You may need to resume treatment.

If you do not have the opportunity to consult your doctor, you can use the teleconsultation here:

https://www.gdziepolek.pl/telekonsultacja

Good morning, I have a problem, in mid-February I had intercourse, nothing broke (I'm not on any anti pills), a month has passed and my period is late, in the meantime I had cystitis and I was taking 3 doses of antibiotic to drink. I took two pregnancy tests in the afternoon and both came out negative, but my period is still missing. Every now and then there will be blood or brown discharge on the paper, but the second time you go to the toilet, it disappears completely. I have menstrual symptoms (lower abdominal pain). Recently, I had a massive cramp in my lower abdomen that made me vomit. Despite two negative tests and the certainty of condoms (the partner did not inside), can I be pregnant?

To @Ola345: The test was read quite late (7 minutes) - in the case of a positive pregnancy test made from morning urine, two expressive lines appear almost immediately after the test (usually max. up to 5 minutes). I enclose more information about pregnancy tests: https://www.gdziepolek.pl/tematy/test-ciazowy-jaki-wybrac-i-kiedy-zrobic

So this one positive test does not have to suggest pregnancy?

To @Ola345: The tests are reliable and if they indicate negative results, you can assume that they are not. pregnant.

Good morning, I have a problem that does not give me peace, in February (28/1 March) I started using Axia CONTI contraceptive pills (I have cysts on the left ovary - dermoid cysts) and in March before visiting the doctor for I did a pregnancy test and a test for intimate infections, the pregnancy test after more than 7 minutes showed the second line, which was slightly pale but intermittent (test with sensitivity 10 - stream test) the line was getting paler by the hour. The next morning I performed further tests, also with sensitivity of 10, there was only one line. After the next days (5/6 days after the test I did another and also negative). To be sure, April and May I also did tests (sensitivity 10 - pink super sensitive) show one line. In February and January, I had sex with my partner 2/3 days before ovulation or 2/3 days after ovulation. Menstruation I have an irregular cycle, it lasts from 28 to 35 days. My question is, can I be pregnant and the pregnancy tests show negative results? are the tests not reliable and it is better to perform the HCG beta?

To @EWKA: I don't think there's a need. Pregnancy at 8-9 weeks would certainly already be visible on ultrasound.

And do you think that it makes sense to repeat the ultrasound if 9 weeks after intercourse the doctor did not see anything?

To @EWKA: Yes, you don't have to worry about pregnancy.

So if the time in which the manufacturer gave there was no second line, I do not have to worry about pregnancy, after I came out with a line I did a blood test that was negative