 [ Symptoms ] why do my breasts hurt and feel and look like they are getting bigger  for almsot 2 weeks now my breasts have been painful and feel like and look like they are getting bigger i instantly thought of being pregnant but i am on the mirena birth control and although its not 100 effective i still did not believe i were pregnant i took a home pregnancy test from my local drugstore and it was negative why are my breasts feeling this way people i know have been commenting on them looking huge or bigger than normal [ Disease ] swelling or an internal bruise may be the cause for your pain and discomfort may i ask have you missed your period lately