I think it's imperative you talk to your husband. Let him understand where you're at and what you're feeling. He will be the one who can support you the most when you are really down.
I'd just try sleep through these patches of feeling down. You've been here before, and you know that you will feel better in a few days. Hold on to this and be positive.

I feel it helps me a lot to just rant and rave here too - this forum is so full of inspiration and support and it really just pulls you from the depths when you feel you cannot go on anymore.