How about that you're human? That it has only been 5 months!! That you just moved on top of everything.
Don't mistake having a PMA with repressing your feelings. You've got to grieve and allow yourself to feel the loss. The sooner you do that, the sooner you can start to really move on...
I, for one, can't say that not having children makes it easier for you BUT, as you said it sure takes a giant load off your plate and enables for a clean break.
Do you have friends in new city? If not, you've got plenty of GALing to do.
You are so bright and engaging and young, forgive me for predicting that you will be more than ok.
For now, it is really alright to feel like cr*p, it is normal.
I feel like cr*p today too...(Father's Day without me involved, hurts)...