Thanks all, I have seen my Dr, and been tested for pretty much everything it could be, that can be tested for. All the tests of course were normal. So, they don't know what caused the nerve damage, or why the symptoms tend to correlate with diving, but on the theory that my nervous system is aggravated, they put me on a low dose of gabapentin to try to settle things down in my extremities... They think my head thing might by sinus related, so I'm doing Flonase there.
Things do seem to generally feel better, not sure if that is the medication, or just time passing...
Thanks all for taking the time to reply, greatly appreciated!
Neurologists’ mantra. When unsure prescribe Gabapentin. Or Lyrica.