I have a 5 year old female GSD who has always been fearful aggressive, terrified of everyone, noises, and objects. Is there anything I can do to make her relax and comfortable?

Dear Cindy,

I have a 5 year old female GSD who has always been fearful aggressive, terrified of every one (except my mom and me), noises, and objects. If she can't run away from some one then she will bite them. When someone is in the house she will either hide in bedroom or hide behind me. I've had a 12 and 10.5 year old before her and now a 9 month old who never had this problem. I'm very experienced in training dogs, non-professionally, but do not know how to fix her to make her be more comfortable around people/noises. I tried experienced trainers, different methods I knew of, and vet tried stress pills but nothing works. I got her from a breeder I knew nothing about. The breeder said she had the mom out in a field for us not to see. She said the mom is suspicious of people. My mom, vet, and I noticed within the first few days how afraid she was. I called breeder to get information. She said she is probably just suspicious like her mom and I didn't know what I was talking about or doing. That there's no such thing of a fearful aggressive dog. Vet, others and I think it has to be genetic. Is there anything I can do to make her relax and comfortable?

Amber