im 25 and do have nodular breasts but about 4 months ago i found a small lump in my breast and at 1st i was proding it and it was hurting a bit, i went to the doctors and have been put on the list 2 be seen but i cant help to worry while im waiting as now its grown to the size of a marble and doesnt hurt at all anymore,it's on the outside right in the breast tissue,how many other things but cancer could this be? my great nan and her mother died from breast cancer so should i be really worried?