How long has this been going on?
How often is she vomiting?
Is she able to keep water down?
The best thing to do for your kitty would be to take her to your veterinarian for an exam, and possibly an x-ray and blood tests as soon as possible. Anytime vomiting persists for this long its best to seek help. With a kitty this young I worry about a partial intestinal blockage from a foreign body. Other causes are possible as well- it could be anything from an infection to organ disorder and more. Here is a link to a page about vomiting in cats:
If you can't get her in this weekend make sure you keep giving her as much of the gruel that you've been making as she will eat. Small amounts given frequently throughout the day is best. You can also try giving her famotadine (Pepcid). The dosage for cats is 0.25 mg per pound of body weight once daily. It may not help, but it won't hurt anything. If you are afraid she's dehydrated you can give her water or unflavored pedialyte with a dropper.
If you have further questions let me know. If this answer is helpful please click accept. Thank you and best wishes.