One possibility that has nothing to do with the root is that it's a problem in your therapy that these questions are causing you stress and you are worried about your T continuing to ask more about it. Maybe she is putting too much pressure on you and she obviously doesn't realize it until you say something. Maybe it's going too fast, but it sounds like you need to communicate with her and adjust what's happening in your sessions. I'd encourage her to tell her how you feel, because it seems like this dynamic feels similar to what you've described in your history.