Did any of you experience mild cramps, or general achy feeling in your belly around 21 weeks? I have an ultrasound appointment today so I will get to see the baby and make sure everything is ok, but since yesterday throughout the night I;ve had some on and off crampy feeling, sometimes fees like I need to use the bathroom [maybe its just gas /constipation?] and somtimes feels like a mild period cramp, It seems to have stopped now and I still feel the baby kicking as normal. Did anyone else experience something like this?