Consult nearest psychiatrist as you require detailed counseling session and you may require medications to solve your problems as many things can't be discussed in forum like this...With that fallow relaxation techniques like yoga, meditation,avoid alcohol, smoking, coffee, tea...have good sleep and develop healthy food habits..good luck

Visit a Psychologist for detailed evaluation and psychotherapy. Need for medicine would depend on the severity of the problem. Earlier the better.

Loss of interest, decreased concentration and attention, feeling low and disturbed sleep or appetite are some of the signs of depression. Consult a psychiatrist who will assess you in detail. If you are feeling suicidal or hopeless, seek professional help immediately. Try some relaxation techniques like yoga, meditation and deep breathing. Indulge in hobbies. Spend time with people close to you.