So I had had unprotected sex on the 4th or July he pulled out pretty early and he was positive he didn’t get any in me. I was 4 days out from my fertile window. I was supposed to get my period today or yesterday but still nothing. I have barley any discharge when I usually have a lot and my cramps are killing me. I’ve taken 3 pregnancy test in the past few days and they all were clearly negative.

Is it possible I’m pregnant? Is my period late just because of stress? Please help

Also I’ve been taking an anti biotech for 10 days I ended yesterday, could that be the cause of it being late?