Lymph nodes in neck ache all the time, feel like something is growing in throat, a bit of discomfort when swallowing, pain in ear, both sides. and headaches, burning sensation after eating and during the night. could this be cancer?

Yes: However, other conditions such as infectious or purely inflammatory are much more likely. Timely diagnosis and treatment will be critical regardless of what is causing your symptoms and seeking medical attention is strongly suggested.

Need to examine: It is not feasible to provide a meaningful opinion without additional history, physical examination and may be some tests. It would be prudent to see your doctor, as your symptoms warrant an evaluation.. Have a healthy diet, exercise 30 minutes/day, drink plenty of water, have safe sex, no tobacco alcohol weed or street drugs. For nutrition: http://www.choosemyplate.gov/. Get HPV vaccine.