Has your doctor checked you for Restless Leg Syndrome? I suffer from RLS which is a neurological nerve problem and it is as you describe pain and cramps mostly at nighttime. I have had cramps so bad in my calves that I wake up the next morning with bruises on my legs. My doctor has me on klonopin once at bedtime (tried Lyrica but it causes MAJOR weigh gain). It helps but I still have infrequent bouts with the leg cramps and pain - also with leg "twitching" or "jumping" that cannot be controlled. Hope this helps some and good luck to you.