I don't know what this is, It only happens when I go to the bathroom. Im 37 weeks pregnant and Every time my bladder emptys I feel pressure, tightness and hardness a little above my vagina but below my stomach kind of where my cervix is, it goes on for about 15 seconds and I can't move till it goes away, what can you tell me about that? Im kind of nervous, I don't think their contractions cause its only when I pee. But what is it? :confused: