Q: Alarm

Hi there Kuenzia,

It sounds like you had to wake your phone to verify that the alarm was going off but the phone was not making a sound or vibrating. I would start by quitting the Settings and the Alarm apps:

Force an app to close in iOS

1. Press the Home button two times quickly. You'll see small previews of your recently used apps.
2. Swipe left to find the app you want to close.
3. Swipe up on the app's preview to close it.

 
When you have done that restart the device and test the issue again:

iOS: Turning off and on (restarting) and resetting
 

If the issue persists, backup your device to iTunes, then restore it as new and verify that it works. 
 
How to erase your iOS device and then set it up as a new device or restore it from backups

If it does, then restore your backup to either verify it still works and the software just needed reinstalled, or isolate the issue to the backup file itself. 

Thank you for using Apple Support Communities. Would you mind giving us an update to tell us whether or not this works?