I have had two mammogram and one ultra sound on my left breast. Was told by the doctor it was an enlarge lymph node . It was at 10:00 and 10 cen. I have lost weight not trying too, and I also have some postmenopausal bleeding. Why do I have to wait 6 month for another mammogram to see if the lymph node get any bigger? Why not do a biopsy then and there? Worried.