Wow, you've been on a rollercoaster of med changes.

I'm skeptical that just because an antidepressant (or combo) "works on" the same neurotransmitters as another antidepressant that that makes it exactly interchangeable with that other antidepressant.

The symptoms and events and feelings that you've described sound like your body is adjusting to the change in medications.

It doesn't sound like you're having full-blown Cymbalta withdrawal, though. That is very severe. It's very similar to benzo withdrawal. (I have been taking Cymbalta for about 5 years.)

If the edginess is bearable, and if it doesn't get worse, you may just need to give your body and brain time to adjust to the new meds.

I get myoclonus with any antidepressant I've taken that affects serotonin. It's a real pain. I take clonazepam/Klonopin for it, which isn't a happy solution, but neither are Parkinson's meds.

I hope things level out for you.