Call doctor, I got decrease movements after 40 week, doc did a stressed test said my baby was okay and a couple of days later I called again said my baby wasn't moving at all (he was moving but less than before and he keep saying it was normal... So I had to lie) thank goodness he checked again and sent me to the hospital to get induced right the way! Everything went fine I had a beautiful labor and a healthy baby boy, but I wasn't going to risk my baby's health I knew inside me that the decreased movements were not right so I acted!
I would call l&d since you are overdue they would be a better help than your doctor would.
i am 40 weeks and 2 days and baby moves like crazy.i would call doc if u are concern.better to check it out x