Disneyland while pregnant

Anyone go to Disneyland while pregnant? Did you ride quite a few rides? I know they have signs up on certain rides that advise against riding while pregnant for liability Issues or whatever. 
I'm going to talk to my OB and see what they have to say. But figure I'd ask on here for people previous experiences!! 
I'll be about 20 weeks pregnant. First time going!!!! Super excited. We're taking our 3 y/o daughter :)