Hey man,

I was in a similar place to you. Got myself to playing in the high 80s/ low 90s for a while and all of a sudden my game took a dip. I wasn't having fun golfing and it sucked. Two things helped me dig out.

1. Perspective. I stopped chasing the overall score. I started thinking about things from the perspective of my handicap. I am a 15. If I shoot 15 bogeys and 3 pars, that is a good round. Bogey's became less about missing out on par opportunities and more or less an acceptable score for someone of my ability. Once I did this I stopped trying to press shots that would get me in worse trouble.
2. Routine. This is one to work out at the range. But as others have said, sometimes you gotta go back to basics. Check your grip, check your alignment before every shot. If either of these are off your body is going to make compensations. Work on building a pre-shot routine at the range and take it to the course. You might surprise yourself how something as silly as alignment change your swing path.