Hi CM and welcome back.:)
Have you checked out this site?
http://theroadback.org/Sorry I don't have personal experience to share, but you should hear from others who do, so keep checking. In general though, switches between SNRI's and SSRI's are usually pretty smooth
I would advise to follow your doctor's advice, and know that this is your best course of action :)
Wishing you the best with your switch
S.C.