Hey Ana, it sounds like you went into a pretty big dissociative state, when she labeled your secret. That was just your brain protecting you from the pain.
I have only told my therapist and It was just under a year ago. I told her through a letter that I slipped under her door. I thought I was ready until I had to actually speak about it. I was ashamed and embarrassed and wanted to take it all back. Since I've told we only bring it up when I'm willing and it hasn't been that often. And sometimes it's only very briefly. I questioned that once if it was normal that I could tell her this big secret and then just never bring it up in session, she explained that I had done a great job at keeping this secret and putting out this facade to my family at a very early age that everything was normal and I have continued that same mentality throughout my adult life in all areas, not just with the SA. So i can have these big moments of bravery to bring it up and reveal information and emotions but then my subconscious steps in and takes all those thoughts and emotions and locks them up in a box, stores it away until I'm ready to bring it up again. She said not only is it normal but it's a pretty amazing system my brain has established to keep me safe.

I highly encourage when you are ready to bring up everything you wrote in your post. I find discussing my secondary responses to my emotional reactions helps me learn so much more about myself. In my experience, this is really where the "hard work" in therapy they always talk about takes place.