These are typical viral illness symptoms, in which case they will resolve within a week or two.
General measures include drink lots of clear fluids, broth, tea, water, ginger
. The bad headache
is a bit worrisome, but the most common cause of that is dehydration
(those with chronic ha--drink 60 ounces clear fluid daily: watch). If ha is severe or 'worst i ever had': see doc immediately.