How to feel better before Wednesday? Please? :(?

So I have a big day on wednesday. But today I have symptoms of a cold/flu and my stomach is a little upset. (not much).
But I want to know If there's Anything I can do to be well for Wednesday? I'm still well enough to walk around the house, and I'm not throwin up.
Thanks in advance for any answers. Oh and please don't say "take tablets". They're not goin to get me better for wednesday!