five weeks postpartum

Hi, my husband I and had unprotected sex at least 8 times since I gave birth. As of right now I still haven't gotten my period. I know stupid question, but can I still get pregnant quickly? We did the pulled out method. I'm having cramp here and there nothing too serious. I've seen my dr last week she check my cervix and said everything is nice and tight. But I didn't mentioned about having sex. I'm also not Brest feeding, anyone know how soon will you get your period back?