So I'm 8 weeks postpartum. Me and my fiancé just has sex for the second time since I've been on birth control. Well this time he pinky promise he wouldn't nut in me ( but he did both times). So I'm freaking out in my head that I'll be pregnant. I can't afford another baby right now. I thought he'd understand. I'm about to totally reframe from sex. Any advice? Where can I get a chastity belt?