Breasts leaking?!?!

Juno • 20 years old, happily engaged and pregnant with my June baby
I've been noticing wet spots on my bras and shirts.. But tonight my breast really hurt and I gently massaged it like I normally would.. And my nipple started leaking this whitish yellow stuff.. Did the same to the other one.. Same thing happened.. Is that even possible at 15 weeks?! I mean jeez this week has been eventful for this pregnancy!!