Here's some advice from the MedHelp website and our I'm Expecting app on leg cramps. You can find this in the app by going to the Pregnancy Diary from the home screen and selecting Leg cramps from the Symptoms menu. Then click the menu bar in the upper left and select Symptoms Manual to see your symptoms. Hope you feel better soon!
http://www.medhelp.org/pregnancy-health/articles/Leg-Cramps-During-Pregnancy-Your-Symptoms-Manual/2100
It's restless leg try stretching , eat bananas and walk around.
Its normal I experience it to