For The Past Month I've Been Having Strong Cramping In

for the past month I've been having strong cramping in my hands,fingers, legs and chest. I had leg cramps off and on for years, but they have happened in several years. Now, even a hearty laugh will make my chest cramp. I've been drinking tonic water(has quinine in it) seems to help some. Also taking Calm at bed time. Wondering if lack of some vitamin or food group is the cause. Any help would be appreciated.