I Have Muscle Cramps/spasms For Years, And They Are Getting

I have muscle cramps/spasms for years, and they are getting worse. It is not only legs muscle, but also abdomen, hands, back, fingers, all over my body. It starts affecting my life, it happens every time I have to stretch or strain my muscle, for example when I had to grab something stronger. At night, every time I stretch or move my legs wrong way. I am up 5,6,7 times a night. I am taking Flexeril 5 mg, it is not helping anymore. I have better days and night and really bad ones. I mentioned it to doctors many times - no respond. I do not know what to do. Magnesium, potassium, hydration... done it all.