Information on Lymphoma

About 2 months ago I noticed that a lymph node in my neck was swollen. I didn't feel bad or anything just figured I must be trying to develop some type of infection. About 2 weeks later I began to stay really tired all the time. I also noticed another swollen node directly below the original. I let that go as well. I now have a total of seven swollen lumps in my neck and one just to the right of my collarbone. I am constantly tired and my feet and neck itch like crazy, especially at night. Should I be concerned about lymphoma? What could be another cause for this swelling? Tweet