I play in 6 player cash games ($100 and $200 NL) and my game has been affected so much I can't make my normal moves.
Do you think you playing predictably (raise 4-x with big pairs every time, limp with small prs, etc.)?
Are you betting HARD preflop and on the flop, making people suckout on you?
Have you considered a 2 week break to get your headspace back?