OTB WTF?

I have just been informed by my University that ill be competing in a tournament against other universities this weekend. Out of nowhere... needless to say im really nervous but at the same time SUPER PSYKED, Im sure some 12 year old is going to punch my lights out, but the idea of being there, playing chess with a clock against a live person is super amazing. Ill be required to write down the games which ill transcribe to share.

Still im a bit nervous, ive never played OTB before in a tournament.

Any advice?