Bella, I'm pretty much in the same boat as you. It's not nice, but try not to feel down because there's nothing you can do - except go for it again next year.
I know a gap year is not what you want to be doing next year, but things are as good as you make them. Do as everyone else says and make it a good thing.
I knew there was very little chance of getting anything this year; even my teachers were telling me not to bother applying 'cause it wouldn't get me anywhere. It might have been stupid to go against their advice, but I just couldn't see myself backing down and letting go, which is why I applied anyway - it gave me more chance of getting an interview/something than if I hadn't.
So don't let yourself get sad, and just keep plodding on. You'll get there. And I'm sure I'll see you at vet school at some point :P