Please no judgement

So I’m three weeks postpartum and sadly I couldn’t resist the urge and neither my partner. So we had sex without protection like a few times since since 2 weeks postpartum. But now I’m overthinking because I’ve been reading online that you can get pregnant very soon after birth but I’m not sure how soon. I understand the other risk ( infections) which after reading that I told him no more sex. I’m more worried about falling pregnant soon. Has anyone gotten pregnant that fast or does it take awhile ttc after first. Please comment