Hello, I had a fever, chills, cough, body aches, sore throat, and a head ache, so I went to the Doctors at my university and they tested me for strep and flu and both came back negative. I ve been taking acetaminophen every 6 hours since, and I m experiencing a sharp pain under my right rib cage. I was about to take some more medicine, every time I cough I get this pain. It s been a week since I started taking medicine. Should I not take it anymore? I don t want to damage my liver.