Symptoms can absolutely be intermittent. You need to find someone more experienced with RSD/CRPS IMO. This often means travelling to a larger city.

For sleep, try taking a warm bath with Epsom salts and then listening to music that was designed to help put you to sleep--you are under a tremendous amount of stress from the pain and if you do have RSD/CRPS, your brain is dysfunctional as well at this point. If that doesn't help, explore melatonin based meds--over the counter might be sufficient. I had a Rx for a melatonin based med that truly worked years ago, I can't recall the name unfortunately.

And, well, you might be crazy, but nothing in your post points in that direction!