I wish you prayers for peace of mind and the proper diagnosis. It is very rare that someone would have their fingers amputated from it. (obviously, that doesn't seem that way when it happens to someone you know) Try not to let that example bury you in fear. Doctors like to throw many things out before having anything to back it up. It is terrifying and overwelming. Our minds can be both our best friend and our worst enemy.
"Pray, hope & don't worry Padre Pio"
I might have Secondary Raynaud's Syndrome -- my fingers turned pure white and lost all feeling today at work after being briefly exposed to cold and it took a while to get the color and feeling back after holding them under very warm running water for 5 minutes or so --the nurse diagnosed it and we looked it up on line in the office and it all fits. Since I developed it 'later in life' and have been experiencing some symptoms of tingling and los of feeling over the last year, it could be linked to other health problems, which couldbe the real problem. 99.9% of the time I'm fine, so hopefully I can get treatment to keep it under control or from getting worse, if it is truly Raynaud's. I'm just very scared. And since I have to be in the coolers at work a few times every day handling cold foods, I might have to move to a different position or job.