I am 22 weeks and am having some cramp like pain. It's not actual cramps, but I just don't know how else to describe it. It happens a few times in a row, kind of pulsing, then it stops for a minute and starts again. My 3 year old nephew was here earlier and I may have over exerted myself playing with him. We played for about 90 mins, and while we weren't playing rough, it was definitely a different type of physical activity than I'm used to, and a lot of up down, play "running", etc. I've been lying in bed resting and drinking water since he left, but I'm still feeling the pulsing pain. No bleeding or anything like that. Do you think I'm okay?