First day on my own

I have had some incredible support from home these past few weeks. First of all, my mom came to visit and help for a couple weeks. She wondered what she should do at the delivery, and we told her just to bring a book or something to do while we waited and waited. Ha ha ha! That's the new joke of the century. She was incredibly helpful during the delivery and my time in the hospital. Then Kevin took a week off during the first week at home. Between the three of us, we had a pretty good handle on whatever the kids would throw at us.
Then my mom and dad overlapped for 2 days, and my dad came to stay for about 10 days after my mom left. Kevin took the last week of that off, too, and everything was great and fantastic.
My dad left on Saturday, and Kevin went back to work today. (The original plan was that he would take this week off to help out, but he got a new assignment at work in a different division for the World Cup. It started today, and you can't really take the first 5 days of your new assignment off. So we dealt.)
We started out great! The kids got dressed, and we headed out the door to see the veggie guy. The girls ate bananas and watermelon, William slept in the Baby Bjorn, and the longer we stayed, the more produce I bought. It was a great morning. Kevin called shortly after we got home, and I cheerfully told him how fine we were doing. Life was good.
Turns out, though, this mom-of-three-kids thing is much more of an endurance race than a sprint. I'd just left the blocks running with the wind, ahead of the game, and on top of the world. Then at about lunchtime, I hit the wall. Naomi gets pretty grumpy before her nap, and Penny does too, since she has a slow-burning cold that zaps her energy by about midday-- removing my cheerful helper and replacing her with an ornery, self-satisfied stinker. When I sent her to her room (the first time), she came out at the end and started lecturing me on how I wasn't being very nice, because it hurt her feelings when I made her go in her room. And she wasn't to be convinced otherwise.
This was only about 1:00 PM, and suffice it to say, it was a long afternoon.
At 4:00, I sent this email to Kevin:
I'm so frustrated I want to scream right now, but instead I'm going to tell you about it. When Naomi took her nap, I dozed with her for about 5 minutes before I woke up and fed William. He was then awake for the next 2 hours or so, until about 20 minutes ago. Penny has been getting more and more ornery, so I talked her into a resting time. She told me she was "too scared" to choose a room, so I chose one for her and sent her into it. She was grumpy, and she slammed the door as she went in... waking up Naomi.
So now, instead of the moment of silence I was anticipating-- where three kids would be napping or resting and I could nap, rest, or finish a few things I started today-- I have a screaming Penny (she didn't like the spank I gave her in return for Naomi's waking up), a whining Naomi, and a fitfully napping William.
Tomorrow is another day.... and I can't imagine it will be much worse.