1) Restart your iPhone: http://support.apple.com/kb/ht1430
2) Reset All Settings in Settings > General > Reset
One of those will fix it, so check after each one to see if it's fixed beofre going on to the next number.
is i try step 2, will i have to edit my settings again? or is there a way to have them restored?
Reset all settings
Settings > General > Reset > Reset all Settings.
This will return all iDevice settings to factory defaults... you will not lose any data.... But you will have to re-enter all of the device settings.