I'm with Beth. My real nesting energy kicked in at 37 w 2 d, to the point that I'm nesting even though I'm really sick AND pregnant. Before that, the mental drive was there, but I really didn't make any progress. Today, I was up at 5 am and ready to work (I've already worked for more than an hour before logging in here while I eat breakfast.)
Would DH be able to help? Mine doesn't like to make the decisions about what to do with stuff (and yes, mine also made decluttering a priority for ME), but I can ask him to sort through a box of stuff in the evening or on a Saturday, and he likes it when I make short list (5 items or less) of just stuff to move so I don't have to. Sometimes, that's asking him to move a box; other times, it's asking him to remove his tools from the kitchen. At the very least, he can stop making MORE work for you by cleaning up his own messes.
Also, would your toddler be able to help? I've been very surprised that my not-quite-two-year-old LOVES to help pick laundry up off the floor and will gladly hand me almost any small item that she can if I ask her to. She also loves to explore. . . so I'll sit on the floor with her and sort through a box or a shelf or whatever needs to be decluttered. That way, I'm not bending and lifting; we are together; and progress is made, even if very slowly.
The only other thing is I find I need to tell DH what I did, because otherwise he just doesn't see it (well, except the day I left the couch in the middle of the living room when it's normally against a wall.) So that might be telling him I took three bags to Goodwill, or leaving a bag of trash for him to take out. Otherwise, until a room is completely decluttered (and I haven't gotten there yet!), he doesn't notice.
It's hard to be pregnant with a toddler and keep up the maintenance some days, much less make progress. If your DH ever watches your toddler (if he doesn't, maybe he should), he will find that that is tiring enough even though he isn't pregnant! Of course, when my DH watches DD, then I have to clean up the messes both of them made when I come back.
Jo
DD#1 "JellyBean" 6/08
DD#2 "Ha" 6/10
"Theory is great, but as I'm in the trenches of diapers and dishes and ear infections, I try to relax and focus on what's most important: love."--mjs64