Hi,
I think that's terrible the way they are treating you! You should be able to see any doctor you want! I would suggest that you find a new doctor; possibly call your insurance about it to see who they recommend that's covered. Don't mention to the new doctor who you have already been seen by unless he asks you. After all, it's your body and your money! Say a prayer and ask God to help you find the right doctor.
I'll say a prayer for you too.
PML