My dog's nipples are swollen and she keep...?
licking her private area, Have a vet appointment on the 21st, should I try to move it up? What could be causing this?
dude dont u get it shes pregnant! U BETTER MOVE THE APPOINTMENT UP! INCASE IM WRONG AND INCASE IM RIGHT!
Try applying compresses of warm-to-comfortably-hot water and Epsom salts to the nipples. If it is Mastitis or an infection (generally not an overly serious condition) this should help within a couple of days. (Mammary glands can get clogged).
While breast cancer is rare in pets, it can transpire, as can other "breast" problems; so if you don't see an improvement in a couple of days, move up your vet appointment.
However, whether she is licking her privates in addition to the nipple swelling, based on my experience, I suspect one of the conditions within my first paragraph.
ADDED: OK, you answered the question about spaying (not sure what apbt is), but it still could be a pseudo-pregnancy condition (although much, much rarer contained by spayed females). Try the warm compresses for a couple of days.
Phone the vet and ask if they estimate she needs to be seen sooner. Had she had season when she was spayed?