Hello and welcome to Healthcare Magic. Thanks for your query. I appreciate your initiative to seek help. Chewing tobacco / gutkha can not only cause a variety of medical problems, but can even be associated with psychological problems. Nicotine is a psycho-active substance which acts on the brain and decreases the blood flow to the brain. So, it is quite possible that your severe addicion to tobacco could be associated with your psoblems of anxiety, insomnia, etc. Since you seem to have a long-standing and severe addiction to this habit, I would advise you to seek professional help for quitting. There are counselling techniques like Motivational Enhancement Therapy which can help improve your motivation and quit. There are also relapse prevention strategies which you can be taught to prevent going back to these substances. Medication may also be required to treat the withdrawal symptoms, medical complications as well as reduce craving. So, please consult a psychiatrist in your place for a detailed evaluation and further treatment. Wish you all the best. Regards, Dr. Sheeba Stephen