OK, thanks for the information.
From your description, I am very concerned about infectious disease like parvovirus, especially if she is not vaccinated.
This disease can become very rapidly life-threatening to all of your puppies, and it is very contagious.
Because of the profuse diarrhea and vomiting, she will dehydrate very quickly.
Unfortunately, if it is parvo or a similar aggressive gastrointestinal virus, she is not very likely to survive two weeks without aggressive intervention. Puppies with parvo typically require aggressive fluid therapy, broad spectrum antibiotics, etc to have any reasonable chance of survival.
At home, your best bets are to get fluids into her by any means possible (canned food, broth or bullion, etc) and to feed her a bland food to calm her gut (2 parts boiled white rice to 1 part boiled skinless chicken). That said, this is only a stopgap and may not be enough to save her.
If there is any way you can get her to a veterinary facility, even a low-cost facility like a shelter, it will greatly increase her chances of survival.
Sorry to be so doom-and-gloom with you, but if she has been like this for 4 days and it is not improving, she really needs aggressive intervention.
There is more information on parvo here: http://www.petplace.com/dogs/parvoviral-enteritis/page1.aspx
Please let me know if you have any other questions.