HELPPPPPPP

So I had sex on Saturday morning (4 am) and didn’t use any sort of protection. He pulled out and I took a plan b on Sunday night (9 pm). My period is due in 2 weeks. Before having sex he came from a bj but idk if cum could’ve stayed on there. I don’t want to get pregnant. Do you guys think I’ll be fine? Any advice? Anything helps right now please