Well, I went to the doctor, and she said that even if I'm not sick anymore, I shouldn't be eating much and only taking light foods, and no dairy or carbonated things or sugar, because the "tips of my evolli are damaged" or something. She confirmed that it was a stomach virus, and gave me some prescriptions for nausea and stomach pain. The main thing I had been drinking was lemonade, because people said it would help, but apparently that was making me sicker.
So I'm taking pills now, and I'm on a diet of saltine crackers and fruit juice.