I would try to open up a dialogue with your fiance about how you feel, and ask her how you can support her through this. I wouldn't push too hard if she doesn't want to talk about it. Sometimes time is the best healer, it may be too soon for her to continue with the wedding plans. I know how stressful getting into a house can be, especially when your young and don't make a lot. Don't burn yourself out, working 7 days a week while depressed takes a lot out of you. Hang in there, i hope things turn around for you soon.