As I have no idea what's really going on, I'll tell you waht I'd do:

Forget who the fic is for. If you're happy with the assignment, and wanted to strech your talents somewhat, pretend it's for someone else. I don't think you're being a baby, rather that you're stuck on issues that either need to be addressed, or let go of completely. That may sound harsh, but coming from someone who has had two mental breakdowns, it's the best advice I can give.

So, forget about that crap, and focus on the smut. Smut can be helpful in oh, so many ways. :)