My cat is being sick so i gave her some defurring stuff?

Sometimes it takes awhile for them to get the fur up so you may see furless messes for a couple of days until then. Keep using the hairball remedy. If you have the jelly in a tube, an inch a day for 5 days is good. You can also use pineapple juice mixed into the canned food. It has an enzyme that helps break fur up. You can do a teaspoon a day for 5 days on that. If neither of those options helps and your cat continues throwing up, it's a good idea to check in with your vet.