I am 38 wks, lost the mucus plug, am dilated to 2, and my OB says I'll go into labor any day now. The same day I lost my mucus plug, my ENTIRE belly got hard as a rock, with no pain. It will stay that way for quite a while (longer than 5 min), then loosen up. Then it will get hard as a rock again, with no pain or discomfort. Changing positions and drinking water doesn't effect the hardness. Just wondering if anyone has an idea of what this is. I have not experienced this before, and am curious if this is a sign that labor is around the corner.