Lisa,
A lot depends on your particular situation. I am fortunate to have a relatively mild case of RSD. Until the last few years, it was only in my left leg and foot. With some retraining and hard work, I was able to switch from a very physical job to a desk job and keep right on working full time.
I now have Rheumatiod Arthritis on top of spreading RSD, so working on the computer is killing me in my hands. It may not be long before I look for some type of disability retirement. But, I was first diagnosed in 1986!
Don't get too discouraged ahead of time. Take everything as it comes.
Mike