help!!

so I was veryyy drunk the other night and wanted to try anal with my man and I let him finish inside me… days later, I try it again and have immense pains and realize he infact came in my vagina… not in my ass…. So I was ovulating that day according to glow and was in my fertile window, it’s too late to take a plan b now.. what are the chances?? Idk what to do but I know it was stupid. Has this ever happened to any of you?