I would think possible sciatica, but since the hand was involved that rules out sciatica.

I would definately think about getting tested for autoimmune diseases. Also read up on small fiber neuropathy. Cleveland clinic has a good overview of SFN that tells what kind of testing should be done.

Keep going with testing until you get a diagnosis or you feel satisfied that you have done all you can do and accept its idiopathic.

I still don't have a diagnosis after 6 months of extensive testing. I too had symptoms that came and went in the beginning and then just stayed. I was also an active person. I know what you mean about being distracted from real life due to these type of symptoms. It sucks, but when you get your symptoms treated, you can find more time to be in the moment, instead of in your head worrying about what is wrong with you. In the end, symptom control is the real focus for most of us.

I hope you get your answers. Congratulations on your up coming wedding too!