Is your father receptive to your opinions and thoughts on the subject? Considering how hereditary it is known to be, I would think that, given permission from your father, the doctors may value your input very much. That is the key though, your Dad has to tell them that he values your observations and ask the doctor to consider your input.
~speaking as a Mom who was Dx by her 10yo son. A year ago 😉 We take our appointments together and help each other tremendously.