Problems with iOS 8.1.3 on iPod Touch 5G

I own an iPod touch 5G. It runs on iOS 8.1.3 and Facetime and Messaging do not work. I also own an iPad 4 running on the same iOS, and facetime and messaging work perfectly fine. I don't understand why this is happening. I updated the iPad after I updated my iPod. I don't know if my iPod is corrupt. The app store updating/downloading always shows 'Waiting...'. But on my iPad I can update and download perfectly fine! I don't think I can downgrade to iOS 7.

What's happening with Facetime and Messaging is that they don't show up. Just a white screen for messaging, and a black screen for facetime. I restart my iPod touch everyday to see if it will work but it still doesn't. My apple ID is already logged in. Please help me!!!! (I've tried resetting my iPod touch)