It's the Magnesium that will make all the difference in the world, Ma. Magnesium will also help the calcium and the potassium do their jobs as well as playing a role in over 325 biochemical reactions in the body. Aim for 400 - 500 mg a day. Your best bet is to get it in mixed with calcium and vitamine D (this is a common mixture you shouldnt have too much trouble finding). The ratio is generally 2:1 (333mg calcium / 167mg magnesium). Take one three times a day with a meal and have one an hour before bedtime. Magnesium will greatly improve the quality of your sleep. Be sure to get the chelated kind, it is more easily absorped by the body.

HTH,
Nat