(1) Antibiotics are useless against viruses. (2) If you're contagious, aren't you spreading disease amongst your fellow competitors? That seems unsporting.

I also think you'd be better served to stay home and rest. Have you been overtraining?

I would just focus on getting well and skipping competition. Competing while sick is asking for trouble, like inflammation to heart muscle and other nasty stuff.

sleep, vitamin C, bit of light meat, hot meals/soups to level body temperature and get better respiratory condition. [to destroy the mucus you might have gotten in your lungs].

A basketball player (maybe Kobe Bryant?) had the flu one year during NBA finals, and I think they put him on IV during half-time to help him hydrate. Probably not realistic in your case though.

I agree with comments above on antibiotics.

I also agree that best option is to rest, but understand that's not always an option (i.e., if this is a once per year competition).

D3 in an oil-base. 40,000 IUs for 2-3 days. Will boost your immune system & get that bug out of your system pronto.

You're not going to forget all your moves so taking time off > than training. Your conditioning might sucked if youre stillsick day of competition.