Hard belly in the morning?

Bree

Hey! So this is my first pregnancy, I am currently 21 weeks and ive noticed that when I wake up in the morning my belly is very firm and tight and uncomfortable but then after a little while softens and goes back to normal. I have an OB appointment on the 8th so I will talk to my doc about it then but I was curious if any other mamas or mamas to be have or are experiencing this as well and know what it is. It only happens in the morning and my bladder is rarely full when I wake up due to the fact that I get up multiple times a night to pee.