Hi there ~
I understand your concerns. After reading you history, I am glad to hear that the troublesome itching is gone. To answer the rest of your questions:
1. I advise you to consult your psychiatrist
before you start to taper the medications. I believe that you need to do that one at a time, however consulting a psychiatrist would be the best way to do.
2. There is a chance of your symptoms coming back if you have not developed skillsets (with the help of therapy, yoga
, pranayama, etc) to deal with the anxiety
while being on the medication.
3. You might need to take the medications long enough till you have the confidence to go off of them and it depends on you, it may be 2-6 months.
4. I believe you need to have a trusting relationship with your doctor. You mention that things started getting better with medications and therefore I strongly recommend that you have a trusting relationship as your symptoms did improve.
Your immediate concern is to take the advise that I have given you above and consult your psychiatrist as soon as possible with the same questions and find out what medications you need to be on.
I hope this helps. Take care and have a lovely day!