You seem to be suffering from Anxiety disorder. You have stated smoking and this has made your problem worse as nicotine and caffine worsen anxiety. Apart from medicines, one needs to look at life style. Having regular exercise, plenty of fluids, balanced diet, fruits, recreational and creative activity all help to deal with stress. Reduction in stress will help reducing anxiety.
Seeing a counsellor will also help. Some of the medicines you have mentioned, can lead to dependency trait, so be careful about using increasing amount of medication.