Drink lots of water and juices, take vitamins if you can (B vits are especially good), rest as well as you can, and get medical help if you start feeling really bad or scared. For me the first three days were the worst, after that I started feeling more normal and a lot better, at least physically.
Money or no money, work or no work, please get help if you start feeling worse or 'strange'. Better safe than sorry. (ask Dee about that)