@Sanderson921,
It's also worth mentioning that people, individually, have natural ups and downs, highs and lows. Where you see a withdrawal, for her it could simply be a reassignment of energy while she deals with other stressors.
My best friend went AWOL last week, even canceled our normal once a week get together. We met for coffee on Tuesday, I busted her balls a little bit for disappearing on me and she said she just had a really bad week (and went on to joke about how this could potentially happen once a month). It was fine though, we have a mutual trust and open communication, I know that she would have talked to me if she needed to.
Moral of the story is, you guys are still in the "getting to know you" phase of things. There could be a hundred reasons why she has pulled back a little and it may or may not have anything to do with you. You DO need to iron out your own living arrangements so she isn't stressing about that. Reassure her that you care for her and want to continue building a healthy relationship. Part of that is you guys not being forced into cohabitation. Go on dates, spend time with each other, and spend some time individually. Have a mutual agreement to like...one sleepover a week or something so it's something special while the relationship recovers.