It could be the items she vomited that were causing her to vomit or could be somthing else, like a blockage, menaing she has some object in her that is causing an obstruction in her digestive tract.
If she is vomiting, especially because of the fact that is bringing up such items, not eating her usual amount and the fact that the weekend is here I strongly suggest you get her to your vet before this becomes a major problem, like ASAP. An emergancy vet on weekends will cause your pocket book to dwindle five times as fast as a regualr vet appointment.

I hope she's ok, but I'd better be safe than sorry, especially in this case.