Odor from 5mo old private area?

While changing my daughter last night i noticed an odor coming from her vaginal area. It isn’t fishy or foul smelling but more of a musty smell? I checked and didn’t seen any redness or abnormal discharge. This morning when I changed her I checked again and there was a tiny and I mean tiny amount of blood on her wipe. If I hadn’t been looking carefully I wouldn’t have even seen it. I’ve got a call out to her doctor and am waiting for them to return it. She seems fine, nursed and has wet diapers, slept well last night. Anybody have any experience with this before?