I found out that I was pregnant with my son about 4 days before we left for WDW--I had no children at the time. So, I was about 5 or 6 weeks pregnant while at WDW. I didn't have any morning sickness--though I did later in that pregnancy. I drank a lot of water and stayed off space mountain and big thunder mountain. Honestly, at 5 weeks, some people don't even know that they are pregnant and I think that the fetus is pretty protected--I was just playing it real safe as it was my first pregnancy. I did shop for some cute baby clothes and had a great time!