Thank you. I'll give you some first aid steps to take. Buy some unflavored Pedialyte (yes, the kind made for human infants). Use a syringe to put some in the side of your rabbit's mouth -not straight down the throat. Give her a few drops, then wait for her to swallow it, and give her some more. For the first hour, give her a syringe of it every ten minutes. After that, give it once per hour.
While you're at the store, also pick up some infants' simethicone. It's a liquid made to help babies with gas in their stomachs. The pharmacist can help you find it. Give your rabbit a syringe-full of that, too. You can't overdose it. then hold your rabbit on her back on your lap, and gently massage her stomach. If she has gas in her stomach that she can't pass, this may help.
Don't try to force any more food. If she isn't passing any droppings, it can be dangerous to force food into her system.
I've raised rabbits for over 30 years, and can tell you that our rabbit has the signs of a condition called gastrointestinal stasis. This is one of the leading causes of death in rabbits, if it is not treated. There could be gas in the stomach that cannot pass or there could be a blockage in the intestines. Here's a site where you can read more about GI stasis and steps you can take:http://www.bio.miami.edu/hare/ileus.html
The grinding noise that you hear is your rabbit's teeth. They grind their teeth when they are in great pain. I'm going to check on some possibilities to help you see a vet, and will be back with them in just a few minutes. Int he meantime, I wanted to get the first aid measures to you as soon as possible. Will be right back.