If docs won't try anything new, then it's time to find a new doc. There some great CRPS docs in your neck of the woods. I'm blanking on the name of the one that has some good youtube videos up, hopefully someone else will remember.

Have you tried baths? I find they help me reset my temp. You might need to have a heater in the bathroom. You can have a small wall one installed, and they work well.

Does the direct spray bother you at all? Mine did until I put in a new nozzle that is the large circle type.