Leaking breasts?

Mary
So sorry if this is waaaaay TMI, but I need some help! 
​I'm on cd 19, cycles usually around 32
​Days. I usually ovulate on CD 18. I had a cold with a fever earlier this month so my temp chart is basically useless, but according to opk's taken multiple times on and around CD 18, I did not ovulate at the usual time.  
​Last night in bed, I noticed that a circle about the size of a quarter in front on my right nipple was wet. Upon closer inspection, it turns out that my nipple was leaking clear and milky fluid (different colors from different ducts). By squeezing my left breast, I got the same kind of fluid, but in smaller amounts. 
​I have not breast fed for over 18 months, and I have gotten two negative pregnancy tests. One was a frer on cd 18 (I'm a poas addict) and today I got a negative result with a dollar store cheapie. 
​What do you guys think? Is this a symptom of earlier pregnancy? Has it happened to anyone else?