False Positives?

Okay so i need your guys help. Last month i did my first round of letrozole i had 2 dominant follicles. I was supposed to test May 14 if no period but my “period” came May 13 on mother’s day. that only lasted like 3 days then it stopped and i’ve been spotting ever since. I did another round of letrozole this month on day 3-7 of my cycle. i had an ultrasound yesterday to see if the letrozole worked, it did i had 2 dominant follicles in my right ovary. They told me to take ovulation predictor tests so that’s what i’ve been doing and they have all been positive and getting darker and darker. I took the cheap pregnancy test for shits and giggles and saw a faint line. So then i brought out the first response and clear blue all three came back positive … has anyone else had this happen? did i have my period like i thought i did?? am i pregnant? could these be false positives?