Can you tell T1 how you feel triggered? Perhaps T1 can help you work through it so you will safe seeing T2?

Before starting to see T2 my anxiety was through the roof because I would have to tell somebody else about my past and feared judgement and rejection by her. My T1 supported me through that time when I wanted to pull out and not attend my first session. She pointed out signs that T2 was caring and compassionate (they had never knew of each other before I worked with both of them) based upon all interactions I had with T2 even before I ever stepped foot in her office. She also told me she would be there to support me if things did not work out with T2 as well as talk to T2 if I wanted her to to make it easier.

It was a huge help having her help me work through the anxiety.