Toddler sensing baby's upcoming arrival?

I'm 35 +1 day and my 2 yr old son has acted SO different towards me lately. Like extra nice and is all about hugging me, wanting to be held, cuddled etc., he's even been rubbing my belly saying "baby" even more than he has before. He's a sweet boy normally but he's not been as gentle or clingy/lovey as he has been the past couple of days.. I know it sounds crazy but I feel like he knows his baby brother is coming very soon or senses things are about to change even though we haven't talked about it any differently lately or said that to him. Probably nothing but just a weird feeling I have 😂