uterus help at 23 weeks

Carrie
I'm 23 weeks pregnant. Sometimes I notice half of my uterus is hard and the other half is squishy. Is it Braxton hicks or maybe my baby is just scrunched up on the side?? I have an anterior placenta so I can't always feel her move, but usually if I poke and press on that side it gets soft like normal after a few seconds. I'm just really curious!