advice to help me chill out

i had sex with my boyfriend on June 22nd and we started with no condom for like a few seconds and then we put one on and he never finished at all, also im on the pill and i was on my second week and my pariod ended that day. i know its a low chance but ever since that day iv been having cramps but im thinking that it is because of the birth control because ever since iv been taking it iv been having horrible cramps on my period and i have to go to the gyno to see if i have a cyst. and idk if its justy anxiety making me nauseous or anything else, its been a week and im just worried for probably no reason but once i see something not normal with my body i worry