Nipple questions..

Soooo guys. I'll be 33 weeks this friday. I just got out the shower and my nipples were a little purple. So i looked at it them and i squeezed them. Some yellow and clear liquid came out.

NOT tons of it but just a little oozed out. I used to have my nipples peirced. I took them out as soon as i found out i was pregnant. Just wondering if anyone else has had this happen? Or maybe it might have something to do with my piercings idk just a thought, it was kinda weird.