Selfish reason to abort? Ugh

I just turned 19 a couple days ago, I’m a couple days late on my period... I had sex on the 20th with a fwb and then my ex on the 27th. I always ovulate on the 25th and my periods never late... My ovulation test was close on the 25th but not positive... then the 26th it was negative not even close. Then I actually got a pretty strong line but still not positive right before my period was supposed to start... I really have no idea when I ovulated, I do have PCOS but my cycles have been regular for like 6+ months.... i also don’t even know who the father is.... I don’t know if the dr will be able to tell me with it only being a week apart? the fwb, as I’ve gotten to know him more now, I dislike him. He’s cocky and immature as hell. The ex actually hit me the other day over me not wanting to be with him. I’m so scared I keep testing negative but I have all the symptoms... my periods never late I kniw I’m pregnant... I just really don’t want a baby with either of them now, and with this pandemic going on....