Renstay, So glad you asked that question. I have heard of this but no idea what it is let alone what it feels like. I am a bit worried myself now. I get this heavy feeling that bump is lying on the bottom of my tummy just above the pubic area and that feels a bit uncomfy but thought that was just where bump was lying. It happened while I was in with Ob last week. He felt the baby and I asked him where the baby was lying and I just thought that when the baby is lying in that position it is going to feel like this. Don't think I have had BH yet, but like you said, I have had a big dinner and felt tight and hard for a little while but I just sit on the lounge and after a while it feel ok again, in fact i forget about it most of the time.
Other than that, I feel great, I even think I may be begining to waddle when I walk cause bump is starting to feel a bit heavy in certain positions.