I have a reoccurring sore throat, i looked at it in d mirror & saw it looked like a mouth ulcer, painful to swallow things. used mouthwash, didn't go?

Mouth ulcer: Viruses are frequently the cause of recurring mouth ulcers. However, because you are a smoker, you should be checked by your doctor to be sure there is no other reason you keep getting sore throats and ulcer.

Throat swab: Probably should see a dr. And have a throat swab to hopefully help determine what you have and how to effectively treat. Don't hesitate.