Yesterday I got metal spacers put in and they've hurt terribly! Eating is a bit hard and my teeth are sensitive, but this I was told this is to be expected. I'm wondering though, what are these spacers for? I read they're put in before braces, but I already have braces in. Are they for putting braces on the molars? And does this mean it's almost time to get my braces off? Please help! :)