I'm scared and worried. Pill? Pregnancy? Sex?

Emma
Okay so on Saturday I went to my boyfriends house and we had protected and unprotected sex. He pulls out everytime. I'm on BC but I was in such a rush to pack my bag I forgot to take it to his place. I took it as soon as a I got home (7 hours late). But that morning and day we had unprotected sex and protected.
I have just started my second month of BC pills and I am only new. I take my pill everyday on perfect timing except for that one time. I am so angry at myself.
Then last night my boobs were so sore and then today I felt like I was going to vomit and I couldn't eat or drink anything without wanting to vomit. 
I know it is too soon to be pregant. But could I be? Even if it was from a few weeks ago I had sex. 
It's really worrying me and I need reassurance....