Is this Safe/Ok to do? Rides

ChrisChelsea10/08

I plan on going to disneyworld in the begining of September. We thought about trying in August. If I get pregnant it will be 2 1/2 weeks or 4 weeks compared to doctors. I know it's not ideal and we probably should wait until we get back to start trying. But I was wondering will there be a whole lot of harm done since they are the size of a poppyseed and most people don't know there pregnant until 4-6 weeks. I know people drink and do all the normal stuff up until they find out there pregnant. I want to ride almost all the rides at all 4 parks and both waterparks. Would I possibly be ok since the baby will be so small? Thanks for any advice.