Breast pain is a common breast symptom. The reason for breast pain is not clearly understood, and is not usually associated with breast cancer. Breast pain is sometimes associated with hormonal variations called "cyclical breast pain".
You need to have a physical examination so the doctor can evaluate your condition by proceeding with further testing if necessary.
Try to eliminate caffeine intake (Chocolate,cola coffee) Avoiding caffeine can lessen the pain considerably.
Take care and best wishes.