Yep, these things happen. Recently coming off a slump myself, you have my heart felt condolences. Mental, mental, mental..... Finally had to quit thinking about scores, and only concentrate on "the target at hand".
Also, check your settings. During last nights air rifle match, was on my way to a Master's score (started with 12/15 turkeys, yep a 9-in-row in there), and finished with 7/15 pigs! :oops: During the match, was convinced it has to be the shooter, not the equipment. WRONG! :? Pig setting was done when it was hot during practice, and during the match it cooled down. Pig settings were 1/2 minute off high. :roll: Oh well, there is always next time.
Practicing with an air rifle (in my backyard) on paper scaled targets, has been a great help with follow-thru. Keep at it.