Its a common pregnancy symptom. Just try not to stay in the same position for long periods of time. Get up and move around. I noticed the more I walk, the less I get those leg cramps!
I've actually been drinking a lot of milk, which I'm chalking up to pregnancy because I don't really like milk. I will definitely grab some bananas too though! And I have been taking my prenatal vitamins.. but @proudmama2014, I'm not sure how I'm supposed to get him to move. I'm only 24 weeks and I can't quite push on him or anything.. Idk. I just know I'm okay when sitting for the most part but the minute I get up it's like hot white pinching pain all down my left leg in the back and it's driving me nuts!
Potassium helps, so I suggest eating bananas :)