CONGRATS!! Welcome to the pregnancy club

I'm anxiously awaiting my first little one, who's due on 4-22. We went to WDW back in October/November, when I was about four months pregnant. It was fantastic! The worst part was that the trip was so short.
Some tips: 1. Make sure you bring a water bottle. It's important to stay hydrated, and you get dehydrated more quickly when you're pregnant.
2. Also, I carried around a few granola bars, because they could satisfy my snacking and were easy to carry without taking up too much room. At 9 weeks, I was suffering from some morning sickness, but snacking during the day (so as not to let my stomach sit empty for too long) seemed to help things A LOT.
3. If you feel tired, just take a break. I'm used to doing disney at high speed, but I did slow down a little for this vacation. It sounds like you're going during a less busy time of year, so standing on lines shouldn't be massive. If you feel like taking a break before or after riding things, just do it. You never want to get to the point where you're worn out!
4. Bathroom breaks! I have never been to the bathroom at WDW as many times as I was while I was pregnant. Luckily, there are bathrooms all over the parks. If you feel like "maybe I might have to go", just take the stop and go. With all the extra water drinking and walking, you'll need to.
5. Have fun and enjoy!! Make sure you keep eating and drinking and taking your prenatal vitamin, and you'll be fine. It was great walking around WDW and thinking about how happy we'd be taking our baby there in coming years. Check with your doctor as far as rides go. My doctor basically said "use your common sense," because I was still pretty early in my pregnancy. I didn't ride the Rock N Roller Coaster, Space Mountain or Big Thunder Mountain, and I steered clear of motion simulators like Star Wars. My doctor said that Splash Mountain and Tower of Terror would be fine for me to ride. (I skipped Splash, because it was too cold, but ToT was no problem).
Honestly, I was hoping we might be able to squeeze in another WDW last minute trip in late January/early February, but last week I was put on the dreaded bed rest. So we'll have to wait until December '06.