I don't know what's wrong but I agree with Sannah. Do you feel misunderstood by your T regarding your son and the military (I'm glad you are getting the support from them about it! )? Maybe you want to lash out at her for that?

Or, it could be that now you have a lot of hard work in therapy ahead of you and it's overwhelming. Talking to your T at all, and asking for the day change was a huge accomplishment for you!! Maybe you need to relax a bit and just see what happens in your session.

I don't think the trust and opening up is all gone. It wouldn't disappear like that. It could be you're scared of what's next? PLEASE don't stop therapy because of your thoughts and feelings today. Just go, tell your T what's going on, and how you feel. You can do it, granite!