From my perspective this doesn't sound like CRPS but remember there are three stages to it: acute, sub-acute, and chronic. Early on they thought I was full of ya know, and they were convinced I was a drug seeker. Some symptoms during acute for me were inflammation, uncontrollable pain, and this leads to your body countering physiologically naturally by trying to attack the problem through swelling, the nerve signals in the body, to the brain ,etc. Your description seems accurate of the way I remember the acute to sub-acute stage. Chronic is a whole other nightmare.

Anyways, it wasn't until I switched to Jackson Hole, WY that it was taken seriously. The MRI and X-rays didn't show much other than the initial injury, but when I was describing what was happening within my own body he didn't have a CRPS answer. It's when I went to The New York Hospital for Special Surgery that they called it almost immediately; classic symptoms and more tests were done. Mayo Clinic and Scripps Clinic confirmed with at least half a dozen other pain specialists, neurologists, surgeons, etc.

Have you sought a second opinion, and do you have access to doctors in your area that understand CRPS?