Poor little thing....
There are alot of people here with experience and will help you but from what I know - the advise you already got is right on target - you need to pull yourself together - she's feeling what you're feeling and will feed off that....it won't help her if you're very stressed out
she just went thru a big move - even leaving a bad home can be traumatic for any dog...so if you can try to just act normal and let her adjust maybe she'll her come out of her shell but it may take some time.
She sounds like she really needs love and has been thru alot so good for you bringing her into your home....I know the people who foster/rescue here will be offering you good advise so I'm shutting up and will just wish you all the best with her !!
no more crying ok ???