My 5 month old german shepherd is aggressive to other dogs?

She has been socialised from 8 weeks old with other dogs and people, also had puppy training and backed away from the trainer but eventually was alright with him, but the last couple of months she has got worst with other dogs and some men she will bark and back away from, even some family members that she has been... show more She has been socialised from 8 weeks old with other dogs and people, also had puppy training and backed away from the trainer but eventually was alright with him, but the last couple of months she has got worst with other dogs and some men she will bark and back away from, even some family members that she has been socialised with from a puppy
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