what could this be?

i am 13 and recently ive been having a sharp pain in my left breast and it feels like im getting stabbed could this be cancer

[Cleveland Clinic]

Dear Hazel123:  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 and is then called cyclical breast pain.  Noncyclical breast pain does not seem to be linked to hormonal variations and is often localized to one area of the breast tissue.  Noncyclical breast pain may or may not be the result of an injury to the breast.   You may want to bring this problem to the attention of your doctor who could evaluate and perhaps advise you more specifically. Most breast cancer is not painful.  Breast cancer is extraordinarily rare in 13 year old women.