On one of my many trips to the toilet last night, I noticed that there was a wettish patch on the white singlet top I was wearing. It was about where my nipple was, and had stained the singlet top slightly yellow. The wet patch has dried to be a little bit hard. I'm assuming that my nipple was leaking colostrum while I was asleep? Am I correct? It's just really odd because I've never noticed any leaking before, or stains in my bras or anything.