How do I keep going when I'm running on empty?

You are running on empty and you keep going because you genuinely do not know how else to be. That is not a character flaw. Somewhere you learned that stopping was not allowed, that your value was in the pushing, and now going until there is nothing left feels like the only option you have. It is not, though it feels that way from inside. But running on empty is not sustainable, and part of you already knows it, or you would not have put it into words. The question is not how to push harder. You have proven you can push. The real question is how to refill, which is a different skill entirely, one you may never have been taught or allowed to practice. Start by admitting out loud, to yourself or someone you trust, that you cannot keep going like this. Then take one genuine act of rest and let it count, without earning it first. You do not have to solve your whole life this week. You have to interrupt the running for long enough to remember there is another way to live.