Is my baby moving enough?

I am 27+5 and my baby boy usually kicks right behind my bellybutton all the time. Especially when I lay down. He kicked like usual this morning, and slowed down throughout the day. Now all I've been feeling for hours is just flutters VERY low. Right above my pubic bone. Is this enough movement for me to not be worried? I just feel like he's a lot lower than usual.