First off, I'm sorry your therapist made you feel that you were being "observed". That is never a good feeling- especially from a mental health provider because (due to the stigma around mental health conditions) it can feel especially dehumanizing. So I totally get the discomfort you may have felt around that.

Secondly, based on your last post in which you state that "weight loss has been an issue" I think you should absolutely bring all of this up with your therapist. It is NOT your own problem to solve. You don't have to figure it out alone. Her job is to help you figure this out and help you understand what's going on (without judgement, etc). If you ultimately feel that you have to handle this issue alone, despite efforts to get her help with it, then she is not the right therapist for you.

I encourage you to tell her how you felt leaving the last session. It's ok to bluntly ask her if she was observing your weight or physical condition. It's ok to tell her that weight loss (possibly disordered eating) is an issue that you want to work on. And once she's aware of that, it's her job to keep that in mind, gently bring it to the forefront, and to help you work with it in ways that don't increase any shame or avoidance you may have around the subject. It's her JOB!

PS-She's also much less likely to "freak out" if you can bring the subject into the sessions yourself- even if you just say "I don't really know how to talk about this, but I feel that it's important". Therapists are always more calm when a client has at least some self-awareness about what's going on, even if the client needs a lot of help to work on it in therapy. Hope that makes sense.