I went to see a doctor a few days ago due to a sore throat. I was given amoxicillin for strep throat. Now, fout days later the sore throat is gone, but I have some, what appear to be, canker sores on the inside edge of my bottom lip, my cheek, and tounge. The sores are all subsiding, but I have red and painful gums near my bottom front teeth. This area is bright red and now has a burning sensation.