Like a cloud of dust slowly settling on a newly washed floor. So slowly, so gently, it settles, you don't even realize the floor is filthy until later. Much later.
So slowly that when it dawns on you it feels quick, like someone flicked out the lights. All you know is, now you're groping in the dark.
This madness. This sadness.
You know what it is, really. It's not really like Before. Like That Time Long Ago. You're heavily pregnant. You know it's hormones. You know it's the frustration of not being able to do what you need to do because your hips ache so bad, your body is rebelling, and it's so hot. You know the kids drain you, too.
But that knowledge doesn't help you when the darkness settles in. When the light switches off simply when your husband forgets to say goodbye when he leaves in the morning. Buried in a snowdrift, where no one can hear you scream.
Edited to Add:
Outdoorsman got me a gift certificate for a massage, and set a bubble bath for me. My friend took my kids to the park for the afternoon. Sometimes the sun comes back so quickly, you blink back happy tears, blinded by everyone's love.