Suggest Remedy To Avoid Pregnancy

I am 23 years old I have been on birth control for 5 years now and am married, but yesterday I had unprotected sex with someone, he pulled out before he ejaculated but then right after the cum was out he re inserted his penis and we had sex for about 3 minutes after that and he pulled out and came again. Can I be pregnant and what are the chances that I could be pregnant? I had just ended my period that day also. PLEASE HELP IM SCARED!!