i need some help, all of a sudden my monitor just started blinking on and off, it does this every couple of minutes or so and is giving me a headache...checked all the connections, they are solid...checked the configuration, it's set for optimal usage...checked the device manager, it says the device is working properly

....tried turning it off and back on...turned off the computer and back on...tried unplugging it...tried changing the refresh...tried troubleshooting, it said it cannot determine anything is wrong....
should i just uninstall the damn thing and start over??
it's still in good shape, not too old, has never done anything like this before...then just out of the blue (and right in the middle of a game

) it started doing this...
any help, suggestions?