I was on Cymbalta 60mg (I think) for many years and then went off of it over 3 days. I only had the brain zaps/eye moving thing and it lasted about 2 weeks. Then I went on an MAOI so I don't know if that stopped the sensation or if it went away on its own.
Why bother going off Cymbalta if you're going to replace it with Effexor? You'll probably have the same withdrawal response when you try to stop the Effexor.
I'd love to know if your neurologist supports you starting Effexor ...
Update: So after a week of this insanity it started making me feel like things were crawling all over my skin, keeping me from sitting still for even two seconds! The dizziness/ sleep deprivation/ non eating had caused me to miss several days of work for fear of driving. After this, I was ready to call the doctor and get some help. Before i could pick up the phone to call my neurologist, I get this stabbing exploding pressurization headache in the base of my skull. I couldn't talk, breathe, move, and the pain was radiating down my neck and into my spine... Seriously, how could discontinuing Cymbalta do that?! It felt like I was being stabbed and shocked at the same time. Thanks to my amazing boyfriend, one trip to the ER, some painkiller, some steroids, and some Effexor (a similar drug to Cymbalta and in the same class) and I am 100% after only one day. Amazing what putting the same type of drug into you will do... Scary but I'm willing to keep taking Effexor just so none of this withdrawal nonsense happens again!
Yes, the symptoms you're describing do sound like withdrawal. It's really hard to say how long you will have these symptoms. Hopefully things will start settling down soon. I know that some people are able to take Benadryl to help with the withdrawal. Of course you need to talk to your Dr first before you take anything since you are still on Wellbutrin.