Hello, Possibilities include strep throat or a virus. Strep throat needs treatment with a prescription antibiotic and diagnosis can be confirmed with a tissue swab by your doctor. Viruses need time to clear your body. There are medications that can speed up healing if the virus is diagnosed early on. Keep well hydrated, use a benzocaine gel if the sores cause great discomfort. Anti-inflammatory medication such as Tylenol or Advil may help. Avoid irritants, acidic and spicy foods. Take balanced vitamins especially vitamin B12. Sometimes an oral yeast infection can develop in your mouth. Taking acidophilus can help prevent this occurrence. Treatment with the prescription anti-fungal, Nystatin, may be required. There are combination rinses available by prescription that can help healing and reduce discomfort. Viruses and step are contagious as well. Thank you for your inquiry. I hope that you feel better soon.