I'm just wondering what other causes for sore, tender breasts there are other than pregnancy? My breasts have been very sore and tender for the last week or so, which is midway through my cycle and unusual for that time. They are also noticeably bigger. Obviously I'm worried about pregnancy as we'll but I don't think it's likely as I have the copper iud and I'm not late, but my last period was pretty light for what I usually get. I will be doing a test today anyway. I'm not on any hormone contraception but I wonder if it's possible it's related to some sort of hormone problem? I have been pretty emotional lately too. Tia!