change a few things,,,or,,,take a break, come back to it, do some other things that you enjoy for the time being (itll get some confidence going again) or practice/work on the problem a little harder so its not an issue anymore
are you talking about foosball confidence???
work on your shots/passes a litle more,,, or learn another shot or pass options (it brings out a new cool thing to your game and sparks new life.. and confidence!) ,watch the Inside foos videos ,(those spark new ideas in my foos game that clears up some problems with my game)
doing the same ol same ol hoping it will fix itself ,,will just make things worse
take up some psychology (its a facinating field) ,lots of good reads out there that will fix the mind game ,since its 90% mental