those are Braxton Hicks contractions it sounds like I got those slot to still am it gets super hard for like 30 seconds and goes away ita normal. just ur body getting ready for the full on contraction in which u have a long way to go
There's a baby stretching out your uterus, which is a muscle. It's always tight because it's always being stretched. (It's originally about the size of a grape.) if your flab is skin, your skins being stretched, if its fat, your fats kinda being pushed to the sides and pushed up against your skin (which makes it hard) while your belly stretches!