Hi Salad
My DS slowed down so much at week 38+5 he didn't move for a whole day! i was so concerned i tried everything to make him move, cold drinks exercise, you name it I tried it lol! In the end i went in to the hospital that night to go on the monitor cos i was so worried but bub was fine, he was just running out of room and having a lazy day. After that I didn't feel him move as much but still enough to stop me from worrying.
Good luck with everything