Oh the joys of hospitals and insurance. I am so sorry that your appointment went so horrible. As many of the others have already noted, try to get every piece of documentation together from your previous doctors and start with calling your insurance company. Yes, there are treatments that your insurance is going to want you to try first but you have already tried them with another doctor and they didn't work then, why should they work now. Bio did give you a nice little hint there by the way. I have had to do that myself a few times.

When dealing with insurance companies, always write down the representatives name, id number, if you can manage to get it from them, date and time of day. It is always nice to have that handy in case they tell you one thing and someone else tells you another thing on another day. It also helps when at an appointment and the doctors want to try something that your insurance company has already told you that you can skip.