My baby boy is due October 4th. I've just entered into my 29th week and the past three days I've noticed my son isn't as active as he usually is. He's still moving but less frequently and not as strong...even when I drink cold water or consume something sugary. I'm so worried. I have an OB appt on Friday morning but should I call Thursday and tell them what's been going on?

Is what I'm experiencing normal?