Forgetting simple things?

I’m 18 weeks pregnant and lately have been forgetting simple things, like my shoes or my purse. Today on my way to work it was like 30 degrees outside and I couldn’t figure out why my heater wasn’t working until I pulled over and saw I had my A/C on. And the other day I got into the shower with my socks on. Oh and a week ago I couldn’t figure out why my car was beeping at me, then I got to a stop sign and realized I hadn’t put my seatbelt on. I’m a forgetful person sometimes but I’m really worried about this. Has anyone else had that happen?