Ive got just above 1/2 inch enlarged submandibular, cervical and submental lymph nodes. they havent changed in 3 years and there mobile and bean shaped and also not painful. i have no signs of infection too. could this be cancer?

Ask every day to the end of time and the answer will not change. Normal sized and positioned nodes are not a sign of cancer. You have been informed on what steps must be taken to be sure. If you are not willing to see a doc and have them removed for pathological study, you are wasting your time and that of site docs.

If the masses have not changed in 3 years, it is not cancer. You may feel the nodes every couple of weeks, if any of the lymph glands doubles in size, becomes painful, ulcerates, or other nodes become enlarged, or you develop fever, or lose weight, you should see a doctor. Wish you good health!