Firstly, please
buy some nicotine
juice from a manufacturer on the forum for a dose that you would like

Mixing stuff in a non scientific way is only going to make
vaping worse for you.
FQ is extremely complicated, and the long term CNS effects and the like aren't well documented. You should still keep a daily diary and document your endo attacks. You may well of had the condition your whole life and it is presenting itself now.
The surgery option allows the visual examination of how bad the problem is. Your previous gyno gave good advice for the surgery but obviously you shouldn't use her anymore due to the FQ.
Iodine deficient? I doubt it. Your supps are loaded with micro-nutrients. Do not go off the pill, and see your GP/family doc for advise on other pill options. Ginger gave similar advice to this.
The diary might help with determining what the FQ and endo symptoms are or there triggers.