please help me out

Dani • Goth majoring in Mortuary Science. How do you do?
Hello I'm 18 and I've been on birth control (pill) for 4 years. I've only used it to regulate my period. I might sound stupid but hey I'm worried and thought if I shared this I could get feedback I need.
I had intercourse with my boyfriend and we did it "raw". And he accidentally finished inside me. I haven't missed a pill in a long time. If anything, maybe a couple hours late.
I'm worried about becoming pregnant. I am currently on "PMS" week, and will get my period (hopefully) in a few days. If anyone could help me out, please do.