Sucks, man, but that's the game. Just take a couple days off and forget about poker. When I start to look at AA v QJo matchups with dread because I KNOW he's gonna flop two pair, it's time for a break. Do yourself a favor, though--get away from the screen or the felt entirely--no reading, no videos. Then after a couple of days, come back, read a bit, watch some vids and then start smackin' 'em around again. Also, keep playing well within your bankroll; the swings won't seem so brutal.
I agree with Edmond. Take at least 2-3 days off or better yet, just don't play again until you really 'want' to. That could be tomorrow, it could be next week or it could be next month. Also, you might try to move down in stakes a bit and play a different game. There was a time when I was taking bad beat after bad beat and I started playing Omaha H/L for a few weeks. It was a lot of fun and really helped get me back into it.
Definitely take some time off but leave poker completely out of that time...no books or videos about poker. Let your mind clear a little.