I am also on the autism spectrum as is my eldest son. We have a hereditary form of neuropathy, my sons are 27 and 30. I can understand how frustrating it must be for you as neuropathy is often a very hard thing to diagnose. Unless it is a hereditary form, caused by diabetes or alcoholism, or due to a compression as yours may be many people have to settle for a diagnosis of idiopathic or unknown origin. Not having a clear diagnosis would have driven me crazy as I really need outside confirmation to feel "justified" about my disability. I am very thankful that I have clear test results that indicated the severity of my disease, crazy as that sounds. My sons know what to expect because they see how I am. Neither have severe pain as yet, both have hands and arms affected, only one has numb feet, the other has weak, unstable ankles.

Living with uncertainty is a reality for many neuropathy patients and it is very hard for people like us to tolerate as nailing down everything we can in life is one of the ways we cope with the things we can't control, mainly other people and our reactions to them. My son plans every day, week, month, and year in order to feel a sense of control over his life. I can empathize with how disorienting this must be for you and the temptation to obsess over it.

As facile as this will sound, please try not to let your life be entirely taken over by this disease. The sensations which seem so overwhelming may lessen over time or retreat into the background as you become used to them. As you pursue a diagnosis they may find a nerve compression is at the root of your problems and that can be fixed. Some of the supplements discussed on these forums may be able to help. I have found that walking on soft trails, not tile or asphalt, really improves my pain levels and functionality. Physical therapy has helped keep some range of motion in my ankles and arms.

Pain relief for neuropathy is, at its best, incomplete. Because it is a disease of the nervous system there is no 100% effective way to shut it off. 50 or 60% reduction in pain levels is a great accomplishment. It is also a trial and error process, which might be frustrating for you. Neurontin, while widely prescribed as a first line medication, doesn't help everyone and is often poorly tolerated. Some people are able to tolerate Lyrica which is similar. Often an antidepressant is prescribed for its pain reducing properties. Opiates are a last resort and in someone your age not recommended because of the long term drawbacks, but they do help in some cases.

You should learn a lot more once you are seen at the university hospital. Do you have a family doctor or therapist that is familiar with your situation? Is anyone aware of your anxiety about your condition?