I couldnt tell you without seeing it but my first apbt
was a female and i was going to wait to spay her and do it after her first heat, only cuz thats what i was told by the vet cuz she was already 7 months old when i got her.
Anyway she had went into heat at about month 8. The hormones were so strong that the normal bulg you would see got really big. Looked like her in sides were coming out. Needless to say she was prolapsing ... vet had to do an emergency spay.
Only advice i can give you is if you havent seen it before or if a breeder thats familiar with it cant tell you your fine then get her into the vet. The sooner the better. Better safe then sorry.