clingy child

My 2 year old has been super clingy to me since I've gotten pregnant this time around. I'm not showing and he doesn't understand I'm pregnant. I wonder if he senses it? Or maybe I'm just crazy. Lol. But he never leaves me alone. Whenever I sit down anywhere he has to climb into my lap to cuddle. Don't get me wrong I love cuddles but EVERYTIME I sit down is getting overwhelming. Lol. Anyone else has young children that do this as well?