Hard thing under belly button. 34 weeks

[user1471927379]

Hi girls. So another quick question. My belly button which normally sticks out due to the preganncy has gone in and under it i can feel a hard non moving thing. Not worried just confused lol. My baby is head down and i can feel her bum on the left side of my belly just above my belly button. What is this hard non moving thing i can feel?? She was also just sticking one of her limbs into my belly button for about 20 minutes and after that this happened so really curious. Anyone know what this is?

Shoulders maybe?

My button is flat (33+5) but sometimes goes in at the button and hollows around it, happens when or after baby has been wriggling,
The hard lumping likely to be a body part of some sort ☺

Could it be your own cord stump? There is a little bit of hard tissue where your own cord terminated, it's usually under your navel but maybe your skin has shifted and the lump appears to be disconnected from it.