J.H.
My son had the same thing or something very similar, and when we took him to the doctor, she said that we could mix Malox and Benedryl together and show him how to put it in his mouth and then spit it out. We had to practice several times with water first. He got them about a week and a half ago, and the ones in his mouth are gone, but he still has them on his throat. He didn't really eat or drink anything for a week and then he slowly started eating. The hardest part for me was that he was so hungry and wanted to eat so badly, but everything, even water hurt him. I hope this helps and that your little feels better soon! J.