Last month I got a canker sore on my inner lip. It healed within 2 weeks but Was mildly uncomfortable. Yesterday I accidentally popped a small blood blister in my mouth on my inner cheek. I can feel the lymph node behind my ear has a little bump as well. None of this hurts. I had a mild headache and dry throat as well between today and yesterday. I know my dental hygiene isn't great, I'm just worried this is an early stage to oral cancer.