Hello,
Welcome to Healthcare Magic.
Please consult your 
psychiatrist for anxiety, stress and depression.
Tablet 
clonazepam is best for anxiety and stress.
SSRI groups of drugs are helpful in depression.
Do slow deep breathing and 
relaxation therapy for tension.
Do heavy exercise like swimming and cycling.
Involve yourself in other activities like games, music, social activities etc.
Smoking causes 
lung injury due to 
cell damage.
Immunity also decreases due to smoking.
Infection and asthma are high due to loss of resistance to infections. 
Smoking also causes damage to heart vessels.
Nicotine in cigarette causes heart problems.
You must quit smoking.
Please consult your counselor for help.
Hope these all will help you.
Thanks for contacting us.
Take care...