Welcome to the Mom's Panel, Darlene! We're glad you're hEAR! I would love to help a fellow Georgian! I have traveled to Disney while pregnant and also with my five month old son that I was still nursing. Since you mentioned loving the roller coasters, I would wait and visit after your pregnancy especially since you have other children that would probably like to ride the attractions with their mom! My biggest piece of advice would be to stay on property! This will allow you to take advantage of Extra Magic Hours, use of Disney's complimentary transportation, package delivery to your resort, charging privileges to your room, and the added convenience of being able to go back to the resort for midday/breaks or naps. When touring the parks, Disney thinks of everything for families with "little ones." We always take advantage of Rider Swap at attractions that have a minimum height requirement. Rider Swap is when Guests take turns waiting with youngsters too small to ride a certain attraction, then "swap" with another adult Guest from their party to experience the ride without standing in line twice. This will allow your older boys to be able to experience the attraction with both you and your husband.
Baby Care Centers are located in all of the theme parks, water parks, and at Downtown Disney. The Baby Centers are great areas for parents to get away to feed, change, and care for their baby's needs. There is even a private nursing room. To learn more about the Baby Care Centers, follow the link I provided to watch a short video . I hope this information helps! Please let me know if you have any other questions that I can answer for you! Best wishes for a Magical Walt Disney World Vacation and Congratulations on your newest bundle of joy!
Happy Planning!
Jodie