I know we are all very qualified and have been offering great advice so far, so here's my thought. Sounds like appendicitis, which if untreated, is fatal. Whatever it is, we can't diagnose it, but everyone knows that violent stomach cramps and vomiting for three days is not a good start to the week and is reason enough to get off from work and go to the doctor, social anxiety or not. This is your fiancee, if you really love her you would do whatever it takes to get her help. Asking OOT doesn't count.