You are confused; very confused. So that part is wrong with you, but it is fixable.

T is your paid helper. Whatever T does for you is being reimbursed via the fee. Other than paying the T the agreed-upon fee, you have no duties vis-a-vis the T. So, treat her as a car mechanic. She is not much different from a car mechanic - she has specialized skills plus the ability to diagnose and treat problems. Do you feel a sense of duty to your car mechanic (beyond paying for services)? Well, the same applies to the T.

Right now, having T is being counterproductive: you had the ED problem, and now, without being cured of that, you have acquired a new problem of feeling that you must be certain weight to make the T happy that she has given you a correct diagnosis, or else, you would feel like a failure. This IS absurd. Entirely absurd. But I do not think that it is her fault (yet) - you just need to change your attitude. Do not give up on her.