That's a wide range of symptoms that could be all related or not. Have you been checked for a B12 deficiency (or pernicious anemia)? Also, have you ever had an EEG? I know from personal experience, the parietal lobe can cause those electric shock sensations and if it's 'bouncing' off of the occipital lobe, visual disturbances can occur. This was confirmed with a EEG showing seizure activity in both lobes in my case (instead of having a GM seizure that many are more familiar with, I was experiencing the 'electric shocks'). When I was tested for what was 'shocking' me, they also checked for Peripheral Neuropathy.

Wish I could help more

Hope you find answers soon!