It sounds like you were triggered and you dissociated. Yes, it is normal to dissociate in reaction to things that feel unsafe, although it can be a sign that hearing about abuse caused that reaction in you - it means that you didn't feel safe. It is something to talk to T about. I would probably wait until the scheduled session or maybe send an email so that she knew what I wanted to talk about. You probably know her policy about phone calls, so you know best whether or not you should call. It is important to talk about. It would be good to journal about it while it is still fresh. Are you feeling safe now? My rule of thumb is that if you need emergency assistance, you should call. If not, write it down and/or email. I feel like the purpose of phone calls is to manage a crisis or take care of business, but not generally to discuss things that need to be talked about in session. Phone calls are usually too short to get into something like that, and I wouldn't find it satisfying.