what if I'm pregnant?

okay I've had a lot of pregnancy scares lately, probably because I freak out when it's a few days late but still, it got me thinking what if I did? so I casually brought it up to my SO who's leaving for college soon (out of state) and he wouldn't stay he would wanna give it up for adoption and there's no way I would!! idk what to do cause he's going to play football and I would never wanna hold him back from that but if I get pregnant I want him with me. idk maybe I shouldn't worry but I've got this gut feeling about pregnancy and always think about it and dream about it so