Feel like I have canker sores down the back of my throat. What can I do to get rid of them?

Canker sore relief. Consult with your dentist now so he can see the lesions. He may prescribe a mouth wash to sooth the tissue while you wait for the healing. It usually runs its course in 7-10 days. He will make a diagnosis from further information you give him on the history of these lesions.
Canker sores. Canker sores most of the time go away without any treatment. Avoid hot or spicy food, mouth washes with salt water or a mild mouth wash if you get recurrent canker sores you may have an underlying nutritional deficiency and need to be investigated and treated for that.