I almost swallowed my tooth

This morning I was eating my breakfast, a mini doughnut, when I felt something hard. For a second I was going to swallow it as just a hard crusty spot in the doughnut. I thought better of that plan thinking one of my spacers had fallen out. It was the temporary cap on the tooth with the root canal. I've called the dentist on call, who did not answer the phone and am waiting for him to call back. In the meantime the spacer between that tooth and the next one is probably loose and I'll probably swallow it and then my teeth will close in together over night and I wont be able to get my braces tomorrow. Sorry, my imagination got the best of me. Owell, guess I'll be late for work!