am I pregnant or not ??

I'm 16 and had unprotected sex with my boyfriend during my p which is very unlikely to become pregnant from that but 4-5 days after my period we had unprotected sex again and both times he came in me. It's been around maybe 2 weeks, and I feel strange in my stomach and every day every couple of hours I feel the need to vomit. Would I have more symptoms if I was pregnant? And what would be the chance If I am?