My cat is vomiting and she won't eat or drink.. I can not at all afford a vet bill.. What should I do about this matter

You should try and get a vet to listen to you and explain your problem to them. It's a life that could possibly be lost, I hope they aren't that worried about money. :P Say that to them.

How long has this been going on? If it's been more than a couple of days you should call your local ASPCA and see if there is a program that will help you pay for vet bills, if not they may have other suggestions.