I wake up with those pains all the time. I just thought that maybe the baby is pushing up against it with her feet or something. I think a lot of our body parts will hurt often since we have a growing person in it. You could ask your doctor at your next appointment
Talk to your dr. But Unfortunately you probably have developed diastisis recti & have a herniated belly button. I'm prego w my 3rd baby, I started the hernia after my 1st but didn't hurt, my 2nd baby it was worse after birth, but now prego w #3, it's extremely painful somedays. It's worse when I need to go poop. The herniated belly button is when there is a tear where Ur belly bottun is & Ur intenstins protrude causing the pain (look it up online it'll make more sense). Still talk to Ur dr but usually they won't do anything until after baby. The surgery to correct is fairly simple. I just never got around to it bcuz I got prego w #3 rt away (the 2 youngest are 19 months apart).