Weird that, it was Burnley thrashing me in my save that forced me to change my formation (worked btw), and I was in great form before that happened too.
Other things to add, talk to your players about performance individually. If you tell them the right things (you haven't played well recently, try to pick yourself up, you played well last game, keep it up etc), then they will get a slight morale boost which will help the results to come back.
Also, criticise less than you would normally in accordance with performances. If you get loads of chances, but lose anyway, sympathise rather than say you're disappointed. If you play well against a big team but lose anyway, say you're elated.
Hope that helps.