Very enlarged lymph node under ear for around 6 months. getting bigger and harder everyday. sometimes achy. visible and about size of 2.5 cm diameter.

Concerning: Those symptoms are concerning. See a physician to evaluate. Lymphadenopathy can be from many causes including infections, inflammation, and cancer. Since it is getting worse you really need this evaluated.

See md asap: You need to see md to establish diagnosis. Potentially a serious problem. Enlarging over time, hard lymph node needs further evaluation. Could be related to infection or chronic inflamnation, but need yo make sure it is or isn't a more serious problem, e.g. Lymphoma, tumor/ cancer.

See physician: This may be a serious problem or it could be a something very benign. I think you need to see your physician or go to walk in center.