So instead of texting / messaging her, write out the message now (perhaps in a text or on paper) but don't send it. You can read it to her at the start of the next session.

I like to capture my feelings as soon as they occur. Otherwise my left brain tends to distort them into what I should be feeling or into some other disingenuous response. It has taken me a long time just to realize I have feelings and then to figure out what they are. So my approach might be at the beginner / pre-school level.

I agree with the other poster(s) who believe the therapist was reacting to your abuser and not to you.