Hi doctor. I get reoccuring canker sores every 2 or so months. I am a 28 yr old female. I have gotten canker sores since I can remember, when I was a small child. Now I get them in my throat as well. As of current, 2 days ago I woke up with my throat scratchy (I ve had 2 canker sores on the lining of my right cheek for a few days now).Thought maybe it was allergies. Yesterday morning I woke up with a full blown sore throat, lots of thick yellow post nasal drip, body aches and chills. No fever. This morning, I looked in mt throat again, I have 2 huge canker sores directly in the back. Can you help me? Thanks!