I haven't been playing for a week and i am absolutely bad

After a week of not playing league i cannot play decent. I feel shit every game i cannot concentrate or make plays like before. I know what i should be doing but i cant do it. I am terribly slow mechanically and everything feels clumsy. This has been going on for 2 days now and i still don't feel better.

Did his happen to anyon else? Any tips on getting back "in shape"?