I just came from the doctor and at 34 weeks + 3 days, I am measuring about 33 cm. I heard this is fine but the doctor is sending me for an ultrasound which will take place in 3 weeks from now. I am confused as to why they are sending me for a scan if being a couple of cm plus or minus the week of pregnancy I am in is ok. It makes me a bit nervous. All my other ultrasounds dated the baby fine and his mearuements were good. I thought I felt him drop a bit lower the other day. could this be why he seems a bit small this week? Or maybe my due date is off? They really worried me!