Bro change the locks while she is away and don't take any calls from her (if she calls). Three weeks is long enough to get past her.
She is basically telling you "I think we need a little time to see other people". I would be surprised if she's not already getting "it" from someone else.
Better yet, dump her ass right now while you're still under the illusion that you two are still an item...
sorry to hear about this,,,