i have been taking two medications (tannic and biaxin) for what my doctor told me was bronchitis. i finished taking the biaxin yesterday and i did not take all of the tannic. it has been seven days since i started taking the medication and i have developed a fever and my heart has been beating really fast for at least a day and a half. i plan on going to the doctor in the morning. i feel like my heart rate may just be from anxiety. anyone out there who would like to calm me down. please help.