Can toddler sense new pregnancy?

I feel like my two year old has been testing me soo much! He’s doing things he hadn’t been doing, throwing crazy fits with screaming & just all around getting on my nerves. Idk if he can sense this pregnancy or just that i don’t feel well. I’m still very active with him despite my all day nausea, but I get short with him easily when he’s throwing toys and crying & screaming hysterically. I really wish he could be a big boy bc I’m already working long hard crazy hrs & I dontfeel good. Before this current baby I’m carrying, I had 5 miscarriages in a row, so U could imagine I am trying to not put much stress on my body. I have no help besides my husband but he works & I am able to take my son to work with me and all he wants to do is not allow me to work! I wish he’d be more independent when I need him to most.