What is the pain in my chest? please read.?

im 14 years old and ive been having this unexplained pain in my chest. it started when i was watchin tv and i felt a popo in my chest and then a sharp pain came right after. it hurt really bad. and the pain radiated from the left side of my chest near my heart to the right. it stopped for a while and now the feelings coming back. my family has a history of breast cancer and heart problems.. could it be either one.?