Thanks for choosing health care magic for posting your query.
I have gone through your question in detail and I can understand what you are going through.
The so called herbal hookahs in the hookah bars actually do contain nicotine
. That the reason you have had headache. Do refrain from them from next time.
Regarding the permanance of the effects...no, its not permanent and you have not had any damage thats going to be left over.
You can be assured about that.
Hope I am able to answer your concerns.
If you have any further query, I would be glad to help you.
In future if you wish to contact me directly, you can use the below mentioned link:
Wish you good health,
Dr. Srikanth Reddy M.D.