I am 24 and was giving myself a breast exam, and found a half dollar sized lump on my left brest, midline to the nipple but on the top of the aereola. When I squeezed it, a greenish yellow milky pus came out, followed by blood and clear oozing liquid. The lump is firm, does not move, and does not hurt. On and off I have clear nipple discharge for about a year now. My breasts have been feeling very swollen and tender the past few weeks, although I am not ovulationg or getting my period.