Here's a fun short article on a good way to reduce your fear of public speaking. Mike Roizen and Mehmet Oz, the doctor-authors of the YOU: The Owner's Manual series, recommend having sex before a stressful event. This, of course, releases oxytocin.
Ducking into the bathroom at the conference with a significant other probably wouldn't be a great idea; but, if you didn't have too much performance anxiety of the sexual kind, you might ... um... how shall I say this politely? You might self-pleasure to get the same benefit.