Tinson, well dropping smoking can increase anxiety temporarily but is worth it in the long run.
You really should get evaluated by a counselor to see if a cause can be found for your anxiety. Often times things are going on or have gone on that can cause it and may need to be talked over/brought out. For now use 1/2 a tab of ativan instead of a whole tab and see what happens. You can dissolve ativan under the tongue for a bit faster relief(it will taste like sugar).
Anyway seeing a counselor would be next or even a GP to see if you can get started understanding and perhaps relieving your anxious feelings. PM me any time, Alankay