I don't think this site is the one for you to get a detailed information regarding all that bc can entail. I would hope they also gave you American Cancer Society and www.breastcancer.gov, which has a very detailed explanation and is updated frequently. I am a 10 year survivor of triple negative. I was diagnosed at age 55 but I had my first breast lump, which was benign (negative for cancer) at age 36. I would suggest you bring a small spiral and pen and take notes of everything the doctor tells you - do research in advance so that you can write your questions down in advance. That way you won't be trying to absorb and think of your questions at the same time. Good luck to you. Did they do any bloodwork? My daughter had catscratch fever and had large lump under her arm a few years ago. But my no means should you assume it is "nothing." Women of any age are able to get cancer of ovaries, cervix, breasts, uterus, etc. Don't think of there is no family history it doesn't start with you either. I was the first - my sister the second. Good luck. Take care.