Rest and chicken broth. It's also good to put hydrogen peroxide in each ear. Turn your head to the side and let it bubble good. This has been remarkable to speed up recovery, although it tickles alot! Get well soon.
Tamiflu is the most popular fda approved antibiotic for the flu but you must start within 3 days of the onset of symptoms or it is a waste of money. You can only get this from your doctor. A flu shot won't help if you already have the disease. You can also use over the counter medicines for symptoms relief.
Take some multi-vitamins. Get as much bed rest as possible and, if possible, drink gatorade instead of water. Both liquids will hydrate you, but gatorade will help replenish lost electrolytes. Also, try to eat balanced meals with little sugar and lots of nutrients.
There are also quite a few medications you can take that will help with the flu symptoms; they won't get rid of the flu already in your body but they can help to make you feel a bit better. alka seltzer has always done me the greatest good, but that's just my expereince and it may not be the same for you. Goodluck!