I understand your concern--this has a different quality than her typical silences, so naturally you are concerned. I susepct that the holidays, the trip to Venezuela, the job interview (and trip) and the trauma anniversary on top of it--that's all quite a lot to deal with. Evie has been doing great, but it's natural for her (and many others of us) to shut down to recover from overwhelm.

I think you're right to be concerned about depression--I find that often I stop communicating when I am particularly down on myself and my past/present/future. If she's able to otherwise participate in things--be with people, do things--then waiting and watching makes sense. If she's withdrawing more, though, that's more worrisome.