Can 6 month old female dog get pregnant?

no

Most breeders breed their dogs from the age of 2 and a half, at 6 months she is a pup herself and too young to have puppies. Breeding too early is not good and could cause health risks for your dog. If it is an unplanned mating and she has got caught, make sure you get veterinary advise and she is monitored through her pregnancy.