Alright this is a bit long, but I had a similar experience recently - my biggest ever downswing last june, but I managed to turn around in july and august to probably my biggest ever upswing. I was doing great in june at first, then figured I'd open more tables, and started 8 tabling. kaboom...went on a downswing and ended up break even for 20k hands that month, kind of like what is going on with you.

So I took time off from playing, and looked at hands that involved big pots and other hands I saved in a big text file as questionable and analyzed how I could play them better, and posted the harder ones here. Besides that, I started single-tabling HU to 5max at only the juiciest table. Having 8 times the time for every decision, more action with the big fishes, and position more (which I learned to use better) let me play better pre and post flop. Of course I'm playing more then 1 table again, but this was a big reason (besides less bad beats and more good cards) for turning from .1 ptbb/100 for those 20k hands in june to 16+ptbb/100 for the last 11k hands at 50 and 100nl in july/august. I know that probably isn't sustainable long term, but my point is that table selectoin, learning stuff from FTR and my hand histories, and thinking more about what I'm doing has been huge.

So I am basically saying what's already posted, to cut down and be more selective on tables, play short handed and steal/build pots pre flop more in position, and work on your entire game from a fresh start and open mind. Take some time to focus on every decision, eg not just auto c-betting or auto raising a draw. Find the fish who love to call overbet/big-pot "bluffs"