40 years old woman with chronic pain in left shoulder+ left breast pain becomes worse during period and ecg+echo are normal, is it breast cancer?

Need mamogram/ultra: This can be a number of things. breast pain is not a common presenting symptom of breast cancer, but can occur. breast pain during menses is common due to enlargement of the breast ducts during the estrogen surge. I would have a mammogram or ultrasound if you have a painful lump, although this is usually due to fibrocystic disease

Needs evaluation: 1 in 9 american women get breast cancer. I would recommend a breast exam by your obgyn and a mammogram with a breast ultrasound if your breasts are dense. It is good the heart is cleared. It is most likely fibrocystic breasts which cause pain and is worsened by caffeine. I like you thinking to always rule out the worst possibility

Get medical check up: Pain in the breast is not a major symptom of breast Cancer. Sp I would advise you to get a medical examination through your physician who can examine your breast and find the cause of your pain. A mammogram of the breast can easily rule out any evidence of breast cancer. so why delay and keep worrying about it?