Go to your doc and be completely honest and upfront about what you think.

You don't have to convince him of anything because taking meds is up to you, not him. You have a different perspective now and that's okay.

Tell him you wish to start fresh, what to try a different approach.

I remember you felt strongly about your diagnosis. Now you feel differently and that's okay. You've tried this approach and meds, you've learned something from it and that's success!