hi debbie,

First thing I thought when I started to read your post was Calcium, but yer doing that already. Potassium is generally associated with muscle FATIGUE, and not so much cramping.

Magnesium is muscle food, does your calcium supp. also have mag in it?? Since you're having symptoms, a 1:1 formula would be a good idea, for at least a month or two, then 2:1 (twice as much calcium as mag) -- or 750 to 1000 mg Mag, for a month or two, then cut back to 500 mg.. Only other thing I can think of off the top of my head is the type of calcium. Generally a chelate form - citrate, gluconate, malate is more completely absorbed than the carbonate form. The chelate forms are bound to a protein molecule, which helps carry the mineral through the intestinal lining into the blood stream.

Have you been gardening, or doing more yardwork or other things around the house. Just might be a pulled muscle ?? Hope it's better soon ..

Doreen