I think it might help you to know that research has found that audiences can’t pick up on your anxiety as well as you might expect. Psychologists have documented what is called an “illusion of transparency.” Those speaking feel that their nervousness is transparent, but in reality their feelings are not so apparent to observers. This happens because our own emotional experience can be so strong, we are sure our emotions “leak out.” In fact, observers aren’t as good as picking up on a speaker’s emotional state as we tend to expect. So, while you might be so nervous you’re convinced that everyone can tell how nervous you are, in reality that’s very rarely the case. What’s inside of you typically manifests itself too subtly to be detected by others. With this in mind, you should just relax and try to do your best. Know that if you become nervous, you’ll probably be the only one to know.