For night leg cramps and sleeplessness, over-the-counter magnesium supplements (such as magnesium glycinate) are often helpful, as magnesium supports both muscle relaxation and sleep. Staying well-hydrated and gently stretching your calf muscles before bed can also significantly reduce cramps. For sleep, a short-term trial of melatonin may help regulate your sleep cycle. Since these symptoms have lasted 20 days, it is best to consult a doctor. They can check your electrolyte and vitamin levels to rule out any minor underlying deficiencies and recommend the safest treatment plan for you.