I think you should talk to your doctor, not just about the SI but about how you feel about the T's you have had and your experience with them. Just be honest and if the doc thinks you should see a T tell her why you don't want to.

Your doc may have some suggestions about counseling, T's she has had experience with that might fit you better, or alternatives to traditional therapy. Doctors can be very helpful if you give them enough information to work with.