Lol, dude, are you talking about the rubber bands in your braces? You'll be fine! A dentist doesn't put something like that in your mouth, and expect you to keep it there without one tiny accident clause. You'll be fine, it's not going to loop around your insides and strangle your heart to death lmao Stop panicking...And, you've swallowed pennies?! O_O That must be a bitch to pass :P