CMT is Charcot Marie Tooth. It is a hereditary neuropathy and can have a lot of symptoms. You might want to research it and see whether it seems like a possibility for you. I only mentioned it because of the muscle weakness, which does not accompany all neuropathies. It is possible to have it without family members having symptoms, but less likely.
I hope that you find answers. Neuropathy is a frustrating condition, doubly so at your age.