First, that is not a big losing streak, but rather looks like a normal swing assuming that you are not playing micro limits. I take a couple days or week off. Play xbox, read a book whatever you did before you starting playing. Come back fresh and play your game.

If you downloaded hand histories, and you want to get real serious, study them and post them to see where you went wrong. Don't chase your loses by moving up in limits because there is a chance you will only compound your problem.