I had non hodgkins lymphoma, you can't tell by just the swelling of lymph nodes. Test need to be done. Swollen lymph nodes are an indication of lots of different virus, infection etc. Could be sinus or allergy infection. I am now in remission and hope to be there for life. One of the things I've been trying to improve my immune system. I take Immune Support by Dr. Weil daily along with multi. If you are worried about your immune system, there are other things you can do, I'm still in the learning stage. Good that you are having it checked out, always listen to your body as you are and telling your Dr.
The best to you, Joanna