Am i pregnant?

I know all of you probably hear this a lot but I’m really worried. I’m 18 and just been accepted into nursing school. I live with my bf and his parents due to family issues. Anyway, a few days ago we had unprotected sex and he was in me unprotected for about 30 seconds before I made him put a condom on. He did not cum in me. And then today he came on my boobs/ stomach and I had a shower to wash it off and it obviously blended with the water and went near my vagina or over it as it dropped into the drain. I’ve been having really bad cramps and I’m really bloated for the last few days. Please help me. I really don’t want a child right now. I made him promise to always wear a condom from now on. Thankyou :)