You’ve written every story. Literally, you really have, you’re 6,347 years old. It all started with an accident in a time machine you invented. Or, tried to invent. Is it actually a successful test run if you are stuck in time travel and can’t ever get back to shut off the machine and resume your regularly scheduled life? Yes, I didn’t think so either.
But, though you have written every story you still feel the urge, that need, to write. It’s just not that simple when you can’t think of anything you haven’t already written before. How do you come up with a new idea when you really feel you have nothing else to write about?