As always, sound advice from fishinghat.
It's important to note that some 'symptoms' may persist for some time, and another SNRI or SSRI may simply hand you another bouquet of symptoms which you will have to address further down the line.
Right now your brain is busy building the new you. Perhaps the best you can do is let it be and strive to lend a hand. By that I mean create a distraction while your brain is working hard to establish equilibrium. Example-- strive to improve those areas of your life you feel need some improvement: perhaps create a better diet; exercise more; visit a botanical garden; clean out the garage.
Get away from your brain, and put something in order. Anything.
Just do one simple thing to start.
I think it's counterproductive to yearn for the old you; as far as we know, Time only moves in one direction. You will always be a mosaic of all you have met: all you have suffered; all you have triumphed; all you have loved; and all you have lost.
Some small artifacts from your experience with Cymbalta may be included in the new you that emerges from this part of your life.