Japan Autumn Festival at JCCC, Cold sore

We went to JCCC(Japanese Canadian Cultural Centre) to see the Japanese festival. We were very looking forward to go there. Maybe this was the only our fault. At the festival, we couldn't find anything we like. We felt so bad.
After we left the festival, I went to the drugstore to get a medicine for the white stuff in my mouth. I often have this, but I didn't know what to call it. Now I have a very big one (almost 1 centimeter in diameter) inside of my lower lip and another one on the roof of my mouth. A pharmacist told me that my white stuff was a "cold sore". Oh yes, I've heard that word before, at the dentist. There were many kinds of medication for cold sore, or it may be for canker sore. Now I can apply the ointment to my sore area.