Was just in Disney I only went on little rides with my 2 year old daughter ...no Roller coasters or water rides with drops...all the rides beside kiddie rides had signs saying not recommended for pregnant women
I wouldn't recommend rollercoasters at all. You can float in lazy rivers and ride water rides which consists of sitting on a tube. But anything else can harm the baby
It is not safe to go on any amusement park rides other than the really kiddie ones that 2-3 year olds go on that just go in a slow circle, and even then they still have signs up discouraging pregnant women from riding.