Well, I was typing up my reply, and just saw that Nat has posted already. Yes, pins and needles are often a sign of calcium deficiency. You should be getting a bare minimum of 1,000 mg per day .. 1,200 would be better.

Calcium works in tandem with magnesium. You might consider taking extra magnesium as well ... and fortunately many calcium supplement tablets come combined with Mag all in one tablet. Look for a 2:1 formula .. ie, there is twice as much calcium as mag. Usually either 500mg Cal:250mg Mag or 333mg Cal:167mg Mag. Take 2 per day of the first strength or 3 per day of the second.

Doreen