Swollen Lymph Node

Hello

I had the AZ vaccine 10 weeks ago now. About a week after I noticed a lump in my armpit on the same side as the vaccine. The doctor has said she believes it is a swollen lymph node and I have been referred to the breast clinic next week. I have a family history of breast cancer in my father's side with relatives who were in their early 40s so I am a little concerned. I am 32.

Ive read swollen lymph nodes are a side effect of the vaccination but that they should go down within a week or so. Being 10 weeks in has made me anxious. The lump is about the size and shape of a kidney bean and I don't have any other kind of symptoms that I'm aware of. Has anyone else had swollen lymph nodes this long after the vaccination or had anything similar that has not turned out to be anything serious?

Thank you