What is the Mono & Lymphoma Connection???

I am a 32 year old female. I had mono once when I was 20 years old & a second recurrence about 6 months ago. They did a blood test which confirmed I had mono again. They also did other extensive blood testing which all came back normal except for anemia & low B12. Thyroid was also checked & it was normal as well.
I initially went in because I had been feeling very run down, tired all the time, body/joint aches, headaches, dizziness, hot flashes, night sweats, flu-like symptoms, etc. This is what prompted my doctor to do the bloodwork in the first place.
Well, a few weeks ago, while doing my monthly breast exam, I discovered a rather large lump in my left armpit, about the size of a golf ball. My mother, who is a nurse, said it's a swollen lymph node.
My husband was just laid off from work, so I am currently without health insurance. I am just curious, if this swollen lymph node could still be associated with the mono, this long after the initial diagnosis? Should I be concerned? I am still having the same symptoms, nothing seems to be improving & I thought mono only lasted up to a few months at the longest. I am aware there have been studies that link mono with lymphoma. I'm also aware this is very rare, but should I be concerned? Until I get insurance, there's not much I can do at this point...
Any advice, stories, resources, anything ya'll can provide until I can see a doctor would really help.
Thank You

The connection is really not much more than a causative association. What the exact mechanism is, I doubt anyone can say. something like 99 percent of adults in the West have EBV. but EBV associated lymphoma is very rare. are those nodes tender to the touch? or painless?

Thank you so much for your response! No, this area is not painful. I didn't even notice it until I did my exam. It's been there a few weeks or so.
I know it's extremely rare, I'm just trying to figure out why I don't seem to be improving.
Thanks again!

Swollen, non-painful nodes, the anemia, and several of those symptoms could certainly suggest lymphoma, but they could also suggest many less serious things. Either way I think that when you can, you should have a more thorough exam and possibly even a biopsy of a swollen node. EBV-related lymphomas are almost universally aggressive diseases. This is bad in that it's aggressive, good in that aggressive disease responds best to modern therapies like chemo and radiation.

I'm not saying you have that or don't, I have no idea, just saying if it were an EBV associated lymphoma, they tend to grow quickly.