I would suggest taking some time off. A few days, maybe a week. I think you'll be surprised when you come back, that you'll be right where your average was previously.
Sometimes, when you push a thing too much you'll do worse before getting better again, especially if you are fatigued, knowingly or unknowingly.
Like anything else, sometimes you just need a break to refresh.
Good luck and I'm sure by now, you are already doing better!
