yep - i did a similar thread some months ago... but for itchyness. My nipples were extremely sore and sensitve in the 1st and 2nd tri.

I have found moisturising them (i use homebrand vitamin e cream) is the answer.

Maybe the discharge is early colostrum? i could be wrong, not sure when you can start 'leaking' so to speak. whatever it is, it's probably your nipple's natural moisturiser doing its job.

not sure if that helps, but i hope so!

by the way, my nipples are much much better thesedays although still fairly sensitive at times. hopefully you will get some relief soon.