You guys think its possible that your baby knows your pregnant before you do?

My 1 year old has been very very clingy the last few days and he never is. All he wants me to do his hold him and he cries as soon as I leave the room. I've took a few pregnancy test and they all have come back negative but I've been feeling so off here lately. I was just curious if he could know something is going on with mommy! ..