Welcome to HCM
We understand your concerns
From the description you gave, it is clear that you are sufring from anxiety
symptoms due to excess smoking
You started fearing that your habit of smoking will cause you trouble and you want to stop it. You become anxious whenever you smoke and become restless because you cannot leave the habit. These are anxiety symptoms also.
Therefore first consult a generl practioner to rule out any physical causes nd then consult a psychologist
to treat anxiety. I can help you if you desire so.
Get well soon.