Anyone suffer from chronic leg cramps (Charlie Horses)? I've had this problem

for nearly 5 years and I've tried potassium supplements, calcium supplements, an OTC med called "Leg Cramps" (which worked for a while) and then talked to my doctor. He ordered a Doppler test on my legs (which revealed nothing) then said to continue with the Leg Cramps med as it contained quinine. I am about 10 lbs overweight and normally walk 3-5 miles a day (wearing good athletic shoes). I was awakened 2 days ago with the WORST leg cramp ever and my leg is still very sore and I'm at wits end.

I'd appreciate any advice from anyone who suffers the same problem!