Your symptoms are very typical of withdrawal.
Your Dr should have either kept going with the Pristiq or waited for the withdrawal to subside.
As it is you will just need to " tough it out."
Please get back to me if you want to discuss this some more.
Afraid not - not unless you can convince your own Dr to put you back on Pristiq - but now you are on Wellbutrin. All sounds like a bit of a mess.....