Your hormone levels probably have just shifted is all. Your body might be focusing on other things for the moment, not leaking sticky stuff out. You are growing the final stages of a person, a lot of building goes into that, and it keeps your body fairly occupied - I know women are awesome multi-taskers, but sometimes we can't do everything at once .

I never got any colostrum at all before birth and I have breastfed 4 children (not at once LOL).

Best of luck, don't let it bother you. Enjoy the sticky-free nights while you can .