Clingy

For my pregnant mommas I have a question. For those that have toddlers, did your toddler sense your pregnancy before you found out? My toddler has been super clingy and is moaning all the time. He calls for me all the time, and cries when I leave the room. He dosent want anyone else but me. He did the same thing a few months ago before I found out I was pregnant which sadly ended up in a chemical. Has anyone else gone through this?