Hi, I have had this problem with my breasts and nipples for 3 weeks, more specifically, the symptoms started to appear after the menstrual cycle, only as breasts or doubled in size, and then they suddenly decreased, but with great sensitivity to the nipple, and also if I squeeze it, a whitish liquid called colostrum but I'm not sure that's what it is, I mention that I haven't had sexual contact in 6 weeks and I also had my menstrual cycle 8 days earlier and I'm 46 years old if I really rule out being pregnant and I did a pregnancy test to be sure and it is negative only that the tension in the breasts is still felt. What could it be?