Hi Yessica!
First of all Congratulations on deciding to add to your family! I wish you the best on this amazing journey! Second, I've enjoyed many trips to Walt Disney World while pregnant, and one of the most wonderful things is...THE FOOD!! Make sure you take the time to feed that baby (and yourself) while you are there...YUM!
You'll want to stay away from anything that has a height restriction. Here's a list of attractions you'll probably want to save for next trip:
Magic Kingdom:
Big Thunder Mountain Railroad
Splash Mountain
Space Mountain
*Stitch's Great Escape (depending on what stage you are in pregnancy the restraint harness might be uncomfortable)
Tomorrowland Indy Speedway (because of risk of being hit from behind)
Epcot:
Soarin'
Mission: Space
Test Track
Disney's Hollywood Studios:
Tower of Terror
Rock 'n' Roller Coaster
Star Tours (can be bumpy)
Disney's Animal Kingdom:
Expedition Everest
Dinosaur
Primeval Whirl
Kali River Rapids
Kilimanjaro Safaris
As all pregnancies are different, please speak with your doctor prior to your trip. He or she will ultimately know what is safest for you and your baby.
Have a magical vacation!
Amanda