I had enlarged lymph nodes in my neck and in front of my earlobe. When I went to my doctor which obviously does not believe in long covid it was gone by the time I got into him as he was very busy. He just said he doesn't see anything. It was there it was a hard lump and it went away. I too had major concern about lymphoma. I understand what you're going through I'm frustrated with my doctor because my doctor just will not talk about long covid. I've been with him for years I was in for a rude awakening a year and a half ago when I got long covid. So I understand your concern the only thing I can tell you is mine went away. Try not to worry too much and just be proactive in getting your lymph nodes looked at. There's some bizarre things that start happening and I try not to worry about them anymore or I'd be going crazy. I never was allergic to grass in my life I'm an outdoors person. I went to pick a couple pieces of weeds one day which were actually pieces of grass, my fingers inflamed and my arms itch and my fingernails, my nail bed, turned red. They're just so many crazy things that happening. Hang in there. As I previously wrote in a Blog. I try to somehow look at this differently without panicking. I look at it as a little minion inside of me running around doing all this bizarre stuff as in now I'm here try and catch me, now I'm here. I know it sounds nuts let's see only way that I can deal with it. I know we all do we have to do to deal with this crazy long covid. I've had it for a year and a half I've been in the hospital five times. I have an extremely supportive husband and family thank God. My doctor I do not believe believes in long covid, like I had mentioned in many previous comments he will not speak of it every time I go to him with the symptom he will not speak of long covid. You hang in there try to do anything you can to deal with it because sometimes it gets crazy. I keep saying to myself it can always be worse.