Dear Concerned.,
Thanks for writing to us.
You have been a Nicotine addict in that you have had Psychological and Physical dependence on 
Cigarette smoking.That means to say that in the presence of Chemicals (mainly nicotine ) associated with smoking only your systems were able to function normally.Now during Cessation of supply of those chemicals in the internal environment , your systems fail to perform functions properly leading to Withdrawl Syndrome.Cessation of smoking leads to symptoms of 
nicotine withdrawal such as anxiety and irritability.Professional 
smoking cessation support methods generally endeavour to address both nicotine addiction and nicotine 
withdrawal symptoms.
You will have to be examined and treated by a Psychiatryst with Psychotherapy and tranquilisers so that you will not go back to the smoking habit.
Gradually tapering of smoking (Cold Turkey)/speaking to your peer support group/using Nicotine patch/Electronic Cigarettes/Inhalers/Chewing Gums/Lozenges/Group therapy/
Aversion Therapy are the available alternatives.
In addition  primordial prevention in school days itself by "World No Tobacco Day" Celebration/Motivational Therapy/Health Education etc.
Alternative Medicine also offers hope. Yoga/Breathing excercises/Spiritual approach/Hypnosis/Accupunture can be tried as adjunct therapy after Complete Cessation to prevent Relapses.
Wishing you a speedy recovery.,
Dr Lt Cdr ASN Bhushan.,
Ex-Navy.