When you can't see the runway environment --- time to go....
Climb out --have another coffee-- Hold for a bit....
Then - Take another look
BTW -- Not every US airport is equipped for zero/zero landings.
Even when the aircraft is equipped and certified, the ground-based systems must be are installed, likewise certified and continuously monitored by ATC.
Welcome to instrument flight rules...
Trusting ground based systems with zero viz is what got Ron Brown on the side of a mountain right before a 45 went through his head.