I think having experiences with your T of hearing those comments, jumping to misinterpret them, and then clarifying with your T her true intent will be really helpful. You can experience first hand a comment that is not rejecting and really learn that it is not because she tells you so. And hopefully each time that happens with her, you will be less and less apt to jump to negative conclusions. It's a slow process, but having that experience in therapy will be healing, I think. I often am afraid people will get mad at me, if I bring up anything even vaguely conflictual. I have learned to bring up things with T and experience that he does not get mad. Or if he does get kind of pissed off, it's not the end of the world, which is a secret belief I must carry inside (if people get angry at me, I will die, or something warped like that). It's really powerful to have these "counter" experiences with T! He's a safe person to experiment on.

I think the live, direct experience of doing this with your T may help you more than doing written homework. You will make new pathways in your brain that way.