hi there.... discharging nipples are usually not related with pregnancy.at least never in an early stage..in the later end of trimester when the progesterone hormone increases in the body,that time it can still happen.but you should not take this sign normal.you should consult a general surgeon or some gynaec.they will do your breast examination and mammography if required and rule out any underlying pathology.and for your worry about concieving just get your n your husband s basic hormone profiles and his semen examination for once and find out the cause and better get treated.trust me with the high standards reached in science nothing is impossible. wishing u luch and good health