Hi, I had a bad sinus infection and was supposed to take klabax for 5 days. I took it for about 7 days, because I got the dosage wrong and was taking one when I should have been taking two pills. It was terrible, left a better taste that started in my throat and mouth and lasted for hours. On the last day I took them, I felt a rough area just inside my bottom lip. I thought my lip was stripping, but it was some white spots . Do you think the klabax may have caused this?