Leg Cramps!

Holy Moly! I've heard that pregnant women get more leg cramps, but no one ever told you, or me anyways, how bad they hurt! I started getting them about a week and a half ago and they just seem to be getting worse. There was one night I woke up and I couldn't bend my ankle or my knee because my calf was so cramped up. I've tried stretching, massaging, drinking more water, drinking more milk, eating bananas, and exercising and so far none of it works, at least not for any extended amount of time. So, if anyone out there knows of an effective way to get rid of or better yet prevent leg cramps PLEASE tell me!!