Heavy uterus

Hey ladies! So I've been in and out of the hospital and doctors office for the past week with contractions, everything is fine, I'm not dilated or anything but I am 60% effaced apparently. I just have a question. When I stand up and walk around, literally every time, I feel this heaviness in my lower abdomen like my uterus is being pushed down. It's this happening to anyone else? Does it sound like something that I should be worried about? I've had doctors ask about pelvic pressure, that's not what this is, is it?