Breast Pain and lump

I've had breast pain for months. I can manage during the day if I put anti inflammatory gel on the whole left side of my breast. It's even better on days off when I don't have to wear a bra. I had a mammogram 4 years ago for a lump which was just fatty tissue. Now however, I've found a hard lump in painful area. I don't want to be over dramatic or waste peoples time. Most info sites say breast cancer is not painful. Is that right? Should I just keep taking the analgesia? I've been post menopausal for a few years (early onset at 37)