Hello Henry161,
Thank you for using Apple Support Communities!
I would start with force quitting all the running apps:
- Double-click the Home button.
- Swipe left or right until you have located the app you wish to close.
- Swipe the app up to close it.
From: iOS: Force an app to close
http://support.apple.com/kb/ht5137
When you have done that, I would next restart the iPhone:
iOS: Turning off and on (restarting) and resetting
http://support.apple.com/kb/ht1430
If the issue persists, I would next backup your device to iTunes, then restore the device. Before restoring from your backup, try setting up the phone as a new device, and test out Safari to make sure it works properly. Then restore from your backup to verify that it is still working correctly.
iOS: How to back up and restore your content
http://support.apple.com/kb/HT1766
All the very best,
Sterling