DD3 ! Baby is moving a lot less! 😔

I'm 3 days away from my due date and I'm not dilated at all. But I've noticed that my little boy is moving less and lesss. I know they're supposed to move a certain amount within the hour but honestly I'm a young mother so I didn't really keep track of it since he was pretty active. Now I'm becoming worried cause he is moving a lot less. Any advice on what I should do.