I have extreme muscle cramps in my legs, under ribs, hands, and throat. It started in my legs occasionally now its two to five times a night, ribs if I move wrong. Blood work shows I m not low in potassium. I take a magnesium tablet daily,, and have been on vitamin D once a week . I have congestive heart failure and the pain runs my blood pressure extreme high. The doctor does not seem to know what to do. Help.