I got sick about four weeks ago with what seemed to be a cold, then it turned out there was a sinus infection as well. I started taking antibiotics maybe 5 days ago. During this time, I have gone out to run every few days and have felt tired. It seems my heart races and feels tired in general during these runs. Does anyone have any experience with an infection that affected the heart? If so, how long would it take for it to improve, and would it be wise to not run for a while?