Sharp pain in left abdominal side for two days so far

I had the flu or i believe it was the flu two days ago, had fever, body aches all over, a little soar throat and sinus was dark.

Now the flu symptoms are gone and sinus and soar throat are fine except I am having very sharp burning pains on my left abdominal side from naval to the left side and below the ribs, basically where you can put your hand on. It hurts before and after I eat and for two days.

A little nausea from the pain but no diarea (diarrhea) or throwing up.