So every month about two weeks before my period my boobs go from a 32 A to a 32 C they get so sore and it tricks me every month "could I be pregnant " but no I get my period  I had a surgery back in March for my endometriosis and bladder issues but I still go thru crazy cramps and heavy periods and I am a firm believer in not using birth control I am engaged also so I have one sex partner so my question is why do my boobs swell this much ?? And what can I do to help it ??