i had my menstruation for longer than a week now, and i had this sharp pain in my left breast almost every hour for 2 days now. i don't actually know how to differentiate if it's a lump or not because i'm a bit skinny, but the pain is there. i'd like to know if that could be an early sign of breast cancer. is the lump supposed to be visible or palpable, is it supposed to be hard and tender and painful to be a positive symptom? or is it supposed to be painless?





