DOES MY BABY HAVE A TAIL?!?

So I’d attach a photo but it happens randomly and I never catch it in time ! I’m a FTM 38weeks pregnant and any time I go to make a bowel movement or sneeze a squiggly lump appears bulging out around my naval.. it doesn’t hurt it just looks crazy and when I PUSH (sorry that was a really bad typo 🤦🏽‍♀️ I PUSH lightly on the lump) on it it’s soft and I can move it and it goes away.

I think it’s too large /shapely but could it be a hernia?? Or is it possible for the umbillical cord to make an imprint? Does my baby have a tail?!