TTC-not pregnant-leaky nipples?!

My husband and I have been TTC for 15 months with no luck so far. Last night however, I was changing and noticed discharge from my nipple. Just a small amount of clear/white liquid. It was odourless and I was able to get more by using an expressing method. Has anyone else had this/know what this is. Am currently on my last day of my period (which was a week early). I have never been pregnant.

Thanks in advance!