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As you mentioned about your profession, it appears you do not sleep well enough also. You are taking a lot of stress
. You need to relax. Try deep breathing exercises, practice yoga
. Eat high protein diet for good energy to bones and muscles like pulses, cereal, wheat, lean meat (if you are non-vegetarian), eggs. Do not eat junk food, colas. Drink plenty of water. Eat fresh fruits and green leafy vegetables for vutamins and good bowels.