My T is also pretty careful. She allows me to be in charge of how much I share, or to say that I can or can't talk about certain topics. There have been a few times where I haven't been communicating well and my T wasn't aware of how I was feeling and I have left feeling terrible. But those are rare (maybe 2 or 3 times in 2 years?). It's normal for trauma to come up between sessions, so if things were resolved in session, that doesn't mean that the next few days won't be hard. But that doesn't sound like what happened in this case. It sounds like you needed extra time to process and ground yourself before leaving, and your T did not do that. The ending techniques are very important because they help you get on an even keel before leaving and trying to handle the rest of your world.