You say you quit Cymbalta cold turkey 2 weeks ago. That would DEFINITELY cause brain zaps. You're supposed to taper off slowly from that one.

PsychCentral says Omega 3s and B12 are supposed to help...

Brain Zaps: Causes & Treatments For Electrical Shock Sensations

When I accidentally quit Paxil cold turkey (I ran out) I found lots of fresh air and lots of water helped minimize the effects.