Definitely investigate all your options and get second and third opinions so you are absolutely sure what’s going on and the options you have available. As the others have indicated, your still a youngin’ , so while recovery will take some time, you’ve got a really good chance of full recovery. And while the numbness affects your ability to play and enjoy music, I bet it also impacts a whole lot of other areas of your life that will be of higher quality once this gets taken care of. Hang in there.