infected ???

Angele
Ok so I got my nipples peirced back in February and I took them out for a while. When I put them back in it hurt really bad so I just decided to leave them out. Ever since I've left them out my nipples have been really sore, and when I squeeze my boobs, it squeezes out this stuff. Is it infected or is it breast milkv I've never seen it before. 
It's also like super hard. If that help. I just need some help my mom isn't around much