Call the Student Health Center for more information. Avoid alcohol and caffeine. Gargle with warm salt water to relieve a sore throat. It will aggravate your respiratory discomfort. Don't use a decongestant for more than 3 days.
Overuse can actually increase congestion.
It is a good idea to replace your toothbrush after you begin recovering to prevent reinfecting yourself. For the flu, there are viral medications available from your health care practitioner that will help relieve the symptoms.