[Eternal]

I think right now she may have just started thinking about her past relationship and is probably experiencing nostalgia from it. Which is probably why she already wants to take a break and is untagging pictures of you two. She probably misses her previous relationship.
The problem with this and her needing to take a break is that it sounds like she isn't quite ready to be in a new relationship yet which can cause big problems for your new relationship. When she contacts you again, you should have a talk with her about this and just see how she's feeling.