Just another thought here-

I also thought I should mention... in the beginning with my RSD it came on slowly with tenderness and pain like you are describing (after a thumb injury and after slipping and falling in the snow)... and then progressed to severe pain and extreme allodynia (though in the beginning it *was* just tenderness and intermittant pain).

I wouldn't rule out that it isn't RSD just because of my personal experience.

I am no Dr. so I can't be sure if you have RSD or not, but I hope some of what I have said has helped.