text: white dots in the back of my mouth? okay so i have these white dots in the back of my mouth, almost like canker sores. my doctors office isn't open till tomarow. i found them about 4 days ago but they didn't really hurt that bad. now im full blown sick. it hurts to breath, eat, drink, smoke, everything! could i have strep? yeah you definintly got strep once you get the time to get to the doctors office you should let him know about that.  he will give you a prescription for it and it should be gone within a week and a half but you have to continue taking the medicine even though the spots are gone always finish the medicine.