When I read your post, I was aware of how many of your symptoms were identical to what I went through. My foot did the same thing at the doctor's office, the purple color, and the temperature change. One of my first symptoms was that I could not handle even the weight of a bed sheet on my left side of my body. It caused a lot of pain. I have a problem with my left side in that I have intense sensation. I can feel my left eye moving around, my left nostril, my left ear, etc. One thing you mentioned was the drug cost. I was laid off of work in December, and am now on my husband's medical insurance. However, this is a preexisting condition, so his insurance will not cover anything regarding my RSD for this year. My doctor's office contacted the drug companies for compassionate care, and now I get my Neurontin from Pfizer Drug Company at no charge. If you have no drug coverage, talk to your Doctor's office for help.