Mold would be digested in your stomach and intestines. If it's in your blood, only a minor amount would pass to the breastmilk. Not enough to cause harm to the baby. ♥
A little bit of bread mold is unlikely to make you sick. Your stomach acids mostly likely killed any mold you might have accidentally ingested instantly. The worst part is realising that you *might* have eaten something moldy and that tends to make you feel a bit sick in itself, but you’ll most likely be fine. https://www.wellandgood.com/le-creuset-oval-dutch-oven-sale/amp/ If in the unlikely event you do get sick, you don’t have to stop breastfeeding. Just make sure you increase your fluid intake. https://www.healthline.com/health/breastfeeding/food-poisoning-while-breastfeeding#should-you-keep-breastfeeding
It’s fine to breastfeed, your milk isn’t made from the contents of your stomach