How do I fix my recent apps tab?

I was just charging my phone and I was just on my computer. I noticed the LED light was blinking a yellow color. Then when I was using my phone I taped on the recent apps button (which was to the left of the home key) and it wasn't working. The light wasn't showing up but it still vibrates every time I touch it. Also my notifications aren't popping up and I don't know why. Please help me!

from Android Forums at AndroidCentral.com - Ask a Question //forums.androidcentral.com/ask-question/758490-how-do-i-fix-my-recent-apps-tab-new-post.html
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