I took Bella to the vet and he explained that the bites on her lady bits were from BLACK GNATS. Since I recently moved to MN, the bug situation here is one I am not used to (I'm from the freaking deserts of arizona!)
Anyway, we left with some benedryl and antibiotics. Thanks for all your guy's advice and reassurance!
Bella in a sweater, escaping the MN tundra!