Liza,
I may ramble as I have been up since 5 today :)First, sleep deprivation throws everyone off, pregnant mama's especially. It takes several good nights to make up for loss of sleep and it can throw you over the edge so I would try to find some rest when they are in school if that is an option while you are sorting this out. My 5 year old son is like me, with an early rise time (5-6 am) and my 2 year old daughter is a night owl and a non napper. When my husband is home, he helps immensely but when he travels for 3 plus nights, I am wiped out from lack of sleep and an intense pace. I found a variety of books by son's bed, leapster charged on his bed table, the play area set up for play ( a puzzle out, etc,setting food choices, pre-filled drink cups on the lower shelf, protein bars, fruits in lower crisper, pencil, eraser and workbooks, clothes and socks laid out, tv programmed to noggin after he is dressed, fed and played, buys me some time to wake up naturally. I am still up early but overwhelmed and my son is growing more confident. My daughter is learning this too although she sleeps a bit longer but I do the same thing in the later afternoon when I thought she would nap and I get the afternoon fatigue...and it gives an hour of quieter work..not sleep, but quieter things..and they are aware that this is a little break for me. They have had lunch, play, have a snack choice is the crisper (ziplocks of grapes, apples washed, bananas on the counter and a bowl of crackers etc...It takes work but knowing there is a little break helps me and I am ready to forge on to more HW, dinner, bath, bed, especially when dad is travelling or had work deadlines. I am not working officially but as my son's advocate, I spend 20 hours a week writing, conferencing, meeting, reading, going to therapy and appts so I have to be very ogranized and sleep/rest is paramount. Lastly, I know you are pregnant and may or may not nurse but I found after my daughter weaned I was more wiped than ever so I am more nutrition supplements than ever..Kelp pills help, B12, B1, low sugar, probiotics, hi protein, magnesium..it goes on...make sure you take care of yourself and hubby does too :)