Im a 15 yr old male. Back in the middle of May i discovered i had a small hard mass in my left breast. Then a few weeks later i found out there were 2 hard masses( one in each breast). They grew fast and were about .5 cm in diameter, in a matter of 3 weeks. Now fast forward to today, they are about 1cm in diameter and i think they are still growing but at a slower rate. It also hurts when i squeeze but only when squeezed from the top down and not from the sides. What could this be?