FTM - Boobs & Leakage

Hello, ladies! 
I'm currently 25 weeks. When I was around 19 weeks my right nipple leaked colostrum while I was asleep but it didn't happen anymore afterwards. Well a few days ago while watching tv shirtless and braless, my right nipple started leaking again. I squeezed my left nipple to see if anything happened and it started leaking as well. After it stopped it happened again a little later in the day. It hasn't happened since then. Not even if I squeeze it to check, and I only do that to know if I should wear a good or an old bra because I haven't gotten any nipple bads just in case. Anyway, is it normal that this happens days apart? And what does this mean? TIA for any input or advice given!