Welcome to HCM,
Forget about cancer !
It seems that you are having Acute tonsillitis
on your right side giving you problem.
Due to infection on tonsil, lymph
node behind and back of your right ear is enlarged and becomes tender.
Go for antibiotic and anti-inflammatory medicines after consulting your doctor.
Do warm water or listerine
Avoid fried, junk food and cold
Ok and bye.