"Hi, my name is BirdBrain, and I've been coming to these meetings for the last 3 years. I'm a recovering chessaholic."
All jokes aside, maybe you need to take a bit of a break - a week or two, or even a month, and let your mind take care of itself. Take a break, you'll be back in no time with a fresh start.
It takes 30 to 50 good moves to win a game of chess, or rather 30 careful moves and one or two good ones, but it only takes one really stupid move to lose a game. I have been a 1600 to 1750 rated player on chess.com for several years and almost 2000 games, but in the last 6 weeks I have slipped to 1526.
I have played at my usual level, have gotten many even to winning positions with oponents in the 1500-1700 ranges, only to throw game after game away with one terrific blunder. It comes from playing too many games and by looking at the board for 5 seconds instead of a minute. Usually within 15 seconds I remember the themes of each game and which traps to avoid, but I have been afflicted with sporadic chess blindness lately.
I guess the first step to recovery is admitting I have the problem. I will play more consciously from now on and try to make 1700 again by September.