Fundus fun

I had another tummy check today and I'm measuring big (ya think?) I forgot to ask the Dr. what I'm measuring but I'm guessing it must be at least a 2-3 week difference as he wants me to have an ultrasound to check baby's growth. That will be August 7th. I hear 3rd trimester ultrasounds are pretty unreliable so I'm not getting too excited that my due date will change.