Pregnancy scare, Bloating and cramps

Ok so I’m 17 and me and my bf had unprotected sex on March 1st and I been feeling bloated for the past few days now and he told me he think he nutted in me a lil he wasn’t sure of it and now I’m rlly scared bc I been bloated these past few days and I currently am right now it feels like gas , bloating , and cramps mixed together and I’m scared its a possibility that I’m pregnant and I didn’t know when my ovulation started during this time. My next period is supposed to come either March 12 or the 15. What should I do ? Im really scared