Hi MrPink, I am also on a break from my T and I had my first session with a new T today. (He seemed nice but very different to old T)
I told my old T that I didn't know I would be back and I asked him how he would feel about me seeing a different T during the break. He said he would be thrilled I am seeking the support I need and that has removed a lot of the guilt around searching for a new T.
I would say try out a new T and see how you feel. Leaving your options open might help to remove the anxiety around deciding what to do about old T.