Very much been there, done that. Since I work in a manufacturing environment (7X24). I can add my own rule to "don't panic" - sleep on it. Between midnight and 6AM, when production wakes you up. Your monitor processes are e-mailing, texting, sounding the sirens, you've got a radical idea on how to fix the whole mess... stop, just patch enough to limp through until morning, get some sleep, go in and go over your ideas with somebody more sane (or at least more rested). I have more than once realized that what I would have done at 3AM, would have only added fuel to the fire.

Tired people make really stupid decisions. Be aware of this