I agree you need another doctor. One that is not so closed minded, will play detective and support with medications.
Just thinking out loud.

a thought or two...
1. I do not know what test you have had to rule out other disorders as RSD can mimic, or be in conjunction with many syndromes.

2. Did they happen to test for Lymes disease.

3. Did you have any kind of truma? A fall, car or work accident?

4. I had leg jerking from Effexor, did you rule that out, an anti seizure med?

It seems you have a lot going on, in with RSD.

Hope you find a sympathetic doctor, one like this can mess a medical history up real fast.
Dianne