You are too sensitive - a tiny bit of mold on the surface won't even be noticeable!
It was a lot of mold lol two big huge blue ish circles on the side I bitDon’t worry. Nobody ever got botulism from a bit of mold on bread.
I am not advocating eating moldy bagels. And actually I never have. But I do know that if the mold hasn’t taken over the whole slice you can just cut the moldy bit off a slice of bread and no harm will come to you and it only tastes bad when it really gets thoroughly moldy.