She bit the VET and US!

It's normal for dogs to nip out of pain, so if someone tells me their dog bit the vet, I ask what was happening at the time.  But, it's not normal for one's own dog to continually bite family members.  This sounds like a naughty puppy that has learned by practicing this behavior that you are not going to do anything about it.  She sounds pushy and rude, and in need of NILIF.  My advice, before she really does some harm, is to seek help from a motivational trainer in your area.  You can find one here:
[linkhttp://www.ccpdt.com]www.ccpdt.com[/link] or here: [linkhttp://www.clickertraining.com]www.clickertraining.com[/link]
Also, be sure this dog is getting enough of the appropriate kind of exercise.  And, when she is rude to you, simply ignore her and disappear into the bathroom for a couple of minutes.  She will learn that her rudeness doesn't get her anything.  NILIF - nothing in life is free.  She should work for everything - Wanna go out?  "sit"  If she sits, the door opens, if not - too bad.  You need to politely take back the leadership role in your household or she may become CEO - not good.  But you need to do it positively, so that the behavior you want is repeated, and the behavior you don't want extinguishes, but the dog retains a good relationship with you.

I have been practicing NILIF since I brought the puppy home at 8 weeks.  I have always done it with her.
The vet was not hurting her in any way he was simply talking to me and petting her at the same time and she turned and bit him.
I try to excersice her with fetch and things but I CANNOT get any type of lead on her to walk her, she bites the heck out of us and is growling, snarling, and freaking out.
We do have a trainer coming out on Monday to try and help, but if that doesn't work I cannot keep this dog. I do foster care and cannot have kids being bit.
Thanks for the suggestions.

You are going to have to treat this problem very aggressively.  Having a dog that shows handler aggression can be very complicated.  I would love to hear what protocols your trainer determines necessary for treatment. If he doesn't have any ideas feel free to shoot me an email and I can help explain how to handle it. 

It sounds like what might have happened is simply that you have a bossy pup that you are ill equipped to deal with without some help from a pro.  If you work with a training facility that does play groups, all the better.  The best prevention for mouthiness involves sufficient exercise (a tired dog is a good dog), interaction with puppies and adult dogs (some of whom can put her in her place using canine tactics LOL), and training (that reinforces your position as her leader). 
It is somewhat typical of bossy outta control pups to turn and "discipline" a person who dares to pat the top of their head or shoulders with a nip.  Some of these dogs will actually go belly up to keep you from patting their heads.  Humans often mistake this for "submissiveness" or they assume a dog that ducks away when they try to pat has been abused.  Often, it's just that the dog is trying to assert status.  Keep in mind that a lot of dogs who go through this are not abnormal or aggressive.  They just haven't properly learned how to live in harmony with humans yet.  I would not give up on a puppy this young without getting some advice from a trainer.  While there are some truly aggressive puppies, the percentage is not that high.  It's way more common to be dealing with just a "juvenile delinquent" who, once you send them to "reform school" turns out to be a great dog. 

Guess what nippy, pushy herding pups need-- a lot less freedom, and lot more work. This pup should be on a tether at all times (get a leash on him, and leave it on) when he's not confined. This pup should be made to work for each and every bite of food, each play session, everything. Get hold of the book Ruff Love and implement the entire full-blown NILIF program.

Can someone school me...what is this NILIF stuff? where do I find it?  Jules

Jules,
 It means Nothing In Life Is Free
 
You can google it and find a direct path, but it basically is that the dog works for everything, pets, treats, love..it works as good as the poeple teaching it if you know what I mean, the better you stick to it the more the dog learns from it