I know all about it. Fortunately mine turned out to be cat scratch fever which took up residence in my lymph nodes and spread to my breast. Nasty business and biopsy scars to prove it.
My GP said all along that it wasn't cancer but I didn't want to take a chance that he was wrong. Large, ropy, tender things in all directions and a huge, inflamed mass under my arm. YUCHH!
Get them checked annually ladies!
SINS