Written confirmation email after every phone call. Cheapest insurance there is.

Following this because I am in the same place and have no idea what to ask at the appointment.

If it needs three other compounds to notice, you have not tested the first one.

Take one to a pharmacist. Free, two minutes, correct. Everything else here is a hypothesis.

I would stop trying to convey how bad it is and start saying what you want them to do. Same for me with naproxen, unfortunately.

Changing prescriber does not reset anything, and people discover that the hard way.