This is pretty much the same conversation you had here in 2016. Did you ever seek medical advice about your fragile condition? It would seem that you need professional assistance. I hope you find the root answer to your questions.
We have a fellow at our school that has only his left arm from birth. He wears a prosthetic on his right. My instructor is creative enough to come up with techniques specifically for him. Our student never gives up and comes to class on a regular basis. He encourages everybody.