Thank you for the great responses so far!

Good to hear I have a little time to get in to see a doctor. All the articles about CRPS I've read describe the end stage symptoms but nothing about the early warning signs and timeframe of the progression. Does the pain/swelling/sweating all come one at once hard or does it start very gradual more like I'm experiencing, and if it's gradual how fast does it ramp up to the major pain/swelling/sweating?

I will look more into PN, too, thanks for bringing that to my attention. Maybe there's new scar tissue from the needle or it nicked a small nerve ending and damaged it or made it hypersensitive, but I assumed that would be a very local pain an not affect the whole bottom of my foot. Maybe that's what triggered my nervous system to go into a fainting spell from the shock and that area still hasn't calmed down. In either case, if I shouldn't ice and neurontin only covers the pain is there anything else I can do until my doctor gets back next week to calm down the nerves (besides minimal walking)? Lidocaine cream, nsaids/ibuprofin? Would physical therapy modalities like ultrasound, estim/tens, vibration make things better or worse?

Now what are the most important diagnostic tests I should inquire about? Is a standard EMG and a muskuloskeletal ultrasound/sonogram scan enough (I know my physiatrist that's away has those two things)? Or are there other tests I should ask about?