My breasts is sore and I have developed a high fever, what am I supposed to do?

There is a possibility that you might have acquired a breast infection. Otherwise also women tend to have sore breasts right before their period or when they are on contraceptives. Even an ill-fitting bra can cause your breasts to become sore. It's best to speak to a doctor to find the exact cause. You can in the meanwhile use a warm compress to soothe your breasts.