2 days felt fine in the morning but by 2pm i feel sick. headache, nasuous, sore throat, cold. is this the course of a virus? how do i treat this?

Cold Treatment: There's no cure for the common cold. Antibiotics are of no use against cold viruses and shouldn't be used unless there's a bacterial infection. Treatment is directed at relieving signs and symptoms.

See Below: You have common cold symptoms and no antibiotics are indicated. Rest, fluids, and over the counter medications to relieve symptoms