15 weeks is this normal

k

I like to use the baby Doppler at home! For the past two weeks I pick up the baby’s heart beat up next to my belly button & today I couldn’t find it in the normal spot.

I picked it up way low about and inch above my pubic bone. Is it normal for him to move back down there?

Also I don’t know if it’s because I waited so long to go pee this morning but that whole lower area was a little sore.