Baby’s Breath and poop smells like sour corn?

Last night I started smelling a strong sour milk / corn smell coming from my baby’s mouth. This morning I noticed her poops smell exactly like her breath. That sour sweet corn smell. She is exclusively breastfed and when I went to feed her my pumped milk from the night before, I discovered it ALSO smells like sour milk / sweet corn. All three have the same smell. Of course I am freaking out because the smell is sweet which can indicate kidney problems and diabetes type 1. But my breast milk would not smell the same as my baby if she had issues like that, right? and how likely would it be for that to happen at the same time? I might’ve waited longer than I thought to refrigerate the milk after pumping / before feeding her last night when this started. She was asleep when I pumped, so the milk sat out for a couple of hours (no more than 4) before I got the rest of it put away in the fridge for the morning feeds. Didn’t notice the smell til morning and haven’t smelled anything like that in my milk since that. Is this something that happens with slightly sour milk? Her breath and poop still smell like the sour milk. What can I do? Is it normal for your baby to change smells from neutral / sweet subtle breast milk smell to sour milk / corn smell sometimes? Did I accidentally feed her sour milk? She literally has no other symptoms. I did an urgent care virtual visit today and they said to just bring it up at our appt in a couple of weeks if it persists. Other: her poop and pee is normal, no fever, no excess fussiness, no lethargy or hyperactivity, sleep is good, eating habits good, my milk has been normal all day long. My sister said maybe my milk has more lipase or maybe it was slightly sour? Does anyone else have a baby that’s gone through this or similar?! I’m so anxious about this. She seems very normal on all other things, but I’m scared I’m overlooking something and don’t want to delay treatment if it’s something serious. 😩