Hi, as you know it's the normal job of lymph nodes to swell to fight an infection as immune cells multiply inside. They should go down, but might not if scarring (aka fibrosis) builds up inside. Or you might be getting reinfected. But there's no reason to think it is lymphoma, unless they get very large. Lymphoma would be among the least likely causes of your symptoms, I wouldn't worry about lymphoma from what you are experiencing..