I have only ever had one therapist, and there did come a time when he could no longer help...and ironically, that came about after he had said he had previously mis-diagnosed me and now knew what I needed. He had actually been correct from the beginning although incomplete since he either knew nothing about Aspergers Syndrome or had simply missed it back then, and then after learning of his own alcoholism he had dismissed everything previous and said A.A. was all I needed.