MzJello as you are aware I am struggling with the same issue with trust so I'm watching this post with interest.

Perna's oyster comment cracked me up--that is exactly what I do.
The little progress I've made has come from me doing what Sunrise suggested. When I feel like my T is likely to have a negative response to something, I go back and ask myself.. What supporting evidence do I have that she will ...criticize,..judge..reject..belittle.. etc? Often when I do this exercise I realize I HAVE NONE! She has never responded in this way so I shouldn't I assume that she would on this particular issue.

I think Sunrise's suggestion is good- write down your most feared response. Then ask yourself has at any time my T responded in this way? Also ask yourself, if you were trying to help someone and they told you whatever, would you be inclined to respond in the way you fear?

Good Luck