About two weeks ago I started to develop three cankersores inside my mouth. I took a flashlight and looked inside my mouth and noticed I had a yellowish tint to the roof of my mouth with two tiny red dots on the roof of my mouth and the side of my cheek. I had a sore throat and pus bumps on the back of my tongue. I went to the doctor and he told me I had puss packets in the back of my throat and that means I have an infection somewhere. He wrote me an antibiotic and sent me on my way. Im just slightly concerned because he only looked in my mouth for a split second and I recently have been under alot of stress so I've started smoking. The last few times I've smoked it caused my tongue to burn.