I'm sorry to hear you're experiencing breast pain and a heavy sensation before your menstrual period, along with back pain during your periods. These symptoms are quite common and often related to hormonal changes during the menstrual cycle rather than breast cancer.

Here’s some information that might help:

• Breast pain and heaviness before periods are usually linked to hormonal fluctuations, especially estrogen and progesterone. This condition is often called cyclical mastalgia and is generally benign (non-cancerous).
• Back pain during periods can be due to menstrual cramps or related pelvic discomfort, which is also common.
• Breast cancer typically presents with other signs such as a persistent lump, nipple discharge, skin changes, or localized pain that does not vary with the menstrual cycle.

Recommendations:

• Keep track of your symptoms and note if the breast pain is strictly related to your menstrual cycle.
• Perform regular breast self-examinations and report any new lumps, persistent pain, or changes in breast appearance to a doctor.
• For back pain and menstrual discomfort, over-the-counter pain relief and heat application may help, but if pain is severe or worsening, consult a gynecologist.
• If you have concerns about breast cancer or persistent breast symptoms, it is important to see a breast specialist or oncologist for a thorough evaluation, which may include imaging tests.

Please consult a breast specialist or gynecologist to discuss your symptoms in detail and receive personalized advice and appropriate investigations if needed. If symptoms worsen or you notice any new breast changes, seek medical attention promptly.To narrow down potential causes, we will need some more information.I understand you're concerned about breast pain and a heavy sensation before your period, along with back pain during menstruation. To better assist you, could you please provide your age and gender?