K.L.
A great majority of women get sore breasts and tender nipples around ovulation time - it's just a side effect of your bodies' natural hormones that are released in greater quantities while you ovulate. My nipples are sore once a month, every month when I ovulate, and have been that way since I started my periods at age 11. Some women are just more sensitive to their own hormones than others - there isn't anything medically you can do, but cold packs (you know the ones you use when breastfeeding and engorged) may alleviate some of the tenderness. More or less, you just have to tough it out and move on.