oral cancer?

I keep getting recurrent swelling towards the back of my mouth towards my throat. I have a constant feeling of something blocking one side of my throat and this switches between my left and right side of my mouth. I also have severe tooth pain, jaw pain and ear ache. I also have white patch on the back of my tongue that doesnt go after brushing. I havent been to the dentist in three years I am really scared of going. But now more worried for neglecting my health. Anyone had the same thing? thanks

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