I think she should go to a Psychiatrist. I only dare to say that because I just got out of a marriage and started having alot of mental issue's. I thought it was the stress over the divorce and other stuff but I went to my dr she sent me to a psychiatrist and we found out it's coming from my past. I was also abused amongst other things. I never dealt with it either I never remembered my childhood because I've been suppressing it so much. But it came out when my psych asked me a bunch of questions, I started to think about it and realized it is making me crazy. I don't know your fiance might feel different about it, but it really helps when you deal with it.