Yeasty smelling breastmilk?!

[Superslinger]

I've woken up this an overwhelming smell of yeast emitting from my boobs! What on earth's going on?! Is it a sign of something wrong?! TIA

Sounds like thrush - this is caused by a yeast like organism. Even if you don't have symptoms, check your baby's mouth for white stuff.
I hope you don't get thrush - it can be painful