Obgyn

So I just got done my monthly check up, and I'll be 26 weeks tomorrow. The doctor told me that from where the baby is laying and where the heartbeat sounds the strongest, he's most likely already flipped head first... I was wondering if anyone has had their baby flip this early?! He didn't say anything was wrong with it, but I'd like to know from experience. I though that they didn't flip completely until at least 30 weeks. I worry too much, but I'm curious. 😖😌