Birth control

So I decided not to take birth control for the simple reason I don't want to gain anymore weight. It runs in my family to gain alot of weight or it leads to blood clots or really heavy bleeding. I know it's stupid of me especially because I recently started having sex again with the pull out method. I honesty don't want to have a baby right away but I will keep the baby if I do end up pregnant. No judgment please but any of you ladies also opted out of b.c and why? My baby isn't even 3 months and I still haven't gotten my period I'm ebf so I don't know if and when I'm ovulating. I know stupid of me but it is what it is.