When in doubt, throw it out. Your sandwich is not worth a night of wondering if you’re going to grow mushrooms from your ears. But if you already ate it? Don’t dwell. Your body is a brilliant, weird machine. It handles worse things on the daily—like that third cup of coffee or the gas station sushi you ate last month.
Remember this: Humans have been eating fermented foods for thousands of years. Cheese? Mold. Soy sauce? Mold. Penicillin? You guessed it—mold. So you’re part of a grand, ancient tradition of eating fuzzy things. Just maybe not the fuzzy things on your week-old leftovers.
Now go grab a glass of water, eat some ginger if you’re nervous, and stop staring at your bread bin like it’s a threat. You’ve got this. And your stomach totally does too.