Is it possible for ingesting human milk to change the scent of my vagina?

No: The vagina has a distinct smell that is not a problem. Each woman has a particular vaginal smell; it is natural. Even when you notice a recent difference in its smell, it is not necessarily an infection. That change may be linked to a specific moment of your menstrual cycle because the smell of your vagina can vary depending on the time of the cycle. Diet will not alter the scent.