Birth control

Im going on two months with being on the pill and only missed one pill last month but Im caught up but me and my boyfriend had sex this past Sunday and he accidentally put the condom on backwards but he didn’t have it fully rolled down so he switched it to the right way and I’m almost positive there was no precum but today I got a ton of whitish discharge, like a lot and I’ve been feeling kinda sick lately and some cramps and I’ve always been paranoid about getting pregnant like would stress out a ton!! So that’s why i got put on the pill, so is there a chance I could get pregnant from the outside of the condom touching his head and then being stuck in?? I keep telling myself its ridiculous, but icant help but stress