Most likely it is your hormones being out of whack. Your body just went through a major shock, and it may take you a few cycles to get back to normal. Is it possible that you are having normal PMS symptoms (only a more severe due to surgery) because your period is due? If it doesn't get better when you take pain meds, you may want to give your doctor a call and see what he/she has to say. I know I get tender beasts when I should have been having a period (I have Ovarian Remnant Syndrome so only a few pieces of ovary, no periods, but definately PMS symptoms).
I don't think it is from my period being due because they have been hurting for 3 weeks now. Maybe it is horemones. I'll probably call the Dr if it doesn't get better after my period. It is even more painful than when I was pregnant. That is the only other time I have had breast pain.
I am kinda curious what the doctor told you. I am in the same situation. I had one ovary removed and now I have severe breast pain. No period since surgery though. My surgery was 3 moths ago.
My doctor said it was from hormonal changes. Said that when you apply body lotion after showering, be sure to also apply it over your breasts. It does help!
I has cysts removed and had pain from my stomach up to my breasts. Felt like I had been nursing 5 babies, it was so uncomfortable. My doctor barely gave me pain medicine. My periods have been kinda weird and sort of irregular. My last 3 periods were close together, followed by a really big menstrual cycle. It feels as if menopause has been speeded up! Im doing much better now, though.