Do you think I'm pregnant?

I missed my birth control pill twice last week, on Tuesday 12/16 and Thursday 12/18. My period wasn't suppose to come until that following Monday 12/22, but it ended up coming on Friday 12/19. I just had sex the Friday my period came and the Monday afterwards 12/22 and and that Tuesday which was 12/23 my period didn't end until 12/33 Tuesday. Do you think there's a chance that I'm pregnant? He did nut in me all three days.