So nervous, how soon can you get pregnant after having a baby?

Keke • Wife💍! Mother 💗💗💙💗💙 Pregnant with baby #5 Due March 2024
My baby is 5 weeks old, and my fiancé and I had sex for the first time since I had our baby and he forgot to pull out! Is it true that you're super fertile after giving birth? I get on birth control in 2 weeks!