Could I still get pregnant??

I'm on the birth control patch and I change it on every change day. Haven't forgotten it. He pulled out and came on my butt.

I am also overweight if that does anything. I'm like 198 pounds.

This is not the first time I've gone without a condom with him I dont think.

Any help or advice? Should I take a plan b? Or am I okay?? Last period began Feb 8 if that helps anything.

(I think I would be close to ovulation)