Hi there,lumps can occur to young women and to older ones too.Many menopausal women with breast problems have posted in this forum (including me) and received good advice and comments about their situations.As you know,pain is almost never associated with breast cancer.The lump you have, could be a Cyst or an abscess since both of them can cause much pain.Have you shown this lump to your doctor? if not,I urge you to go and have the lump checked out.It could be an infection and you need an antibiotic for that.Best wishes.
yes, get it checked out for sure, and soon. that is what I would do.
PS: just your age and the fact that you are a woman puts you at risk for breast cancer, even if it is something else. but from what you describe, even if it's something else, it sounds like a very good reason to me to see a doctor right away.