Hi welcome to HCm Dear Vardhan , your problem seems to be of anemia suffering from neck pains and sleepiness is very common amongest todays generation due to their derailed life style and faulty food habits which lowers immunity and fall prey to different health problems . I would like to suggest you to get yourself checked from a professional for anemia . In the meanwhile , Plan you meals . You need a well ballanced diet , including essential nutrients , fiber ,vitamins and minerals in natural form such as roasted meat & fish, Boiled eggs, skimmed milk & curd , beans and nuts . Eat lot of green leafy and fresh fruit & vegetables Drink plenty of water. Lemon juice with water and honey twice a day and coconut water will give you instant energy . Avoid processed foods carbs , sugar , fried ,fast foods , Tea , coffee ,alcohol and smoking , stress , sleeplessness and Constipation all will produce biochemical and metabolic conditions in your body that will decrease your immunity. So avoiding is definitely the first step in the right direction to detoxing the body, boosting the immune system . For proper assimilation Along with well planned diet regimen , chalking out a well planned physical activity plan is also essential , to strengthen your immune system. Stay erect while you stand ,sit or walk .Maintain right posture to eliminate your neck or back pain. Back bending Exercises , walking ,deep breathing , Kapalbatti , yoga - rolling , stretching , sit - ups and proper rest after work outs all help boost energy & strengthening immune system & help achieving healthy body . Regular follow up with your doctor is necessary Hope this helps solve your query . Take care .All the best . Dont hesitate to come back if have further query .