Cream pie pregnancy

So my bf watched his cum drip from my ass to my vagina (cream pie or whatever he asked for lol) we've done it at least twice this week... It was a decent amount but idk how fertile we are. Could I get pregnant from that? No protection no birth control. We do anal like in place of vaginal sex like... A lot.. And he likes to watch me cream pie sooo his cum gets on my vagina and possibly in I guess??? Idk has anyone got pregnant this way?