Muscle spams through out whole body.

I am having muscle spams through out my body. neck, back , thighs, calf since long time. Even eyes have got strained because of this. I did MRI of full spine and found I'm having cervical straightening. My orthopedic doctor said there is nothing to worry about straightening. As there are no disc bulging. But my main concern is my muscle pain. I can feel the entire body weight coming on my toes. I don't feel like standing. At night leg muscles ( thighs, calves and knee area) start paining a lot. I did electrolyte test, B12 test, D3 test in February. All was normal except D3. I did suppliment for that. So I'm not able to understand why I'm having this issue. My daily routine has been affected very much because this. Need cure for this.