36 weeks and energy

Sofia
Hey girls, quick q. I just turned 36 weeks and have these no energy spells where I just fall asleep. Doesn't matter where I am or what I have done all day, it's like someone turns on the Emergency Nap button and it's lights out for me no way around it. Has anyone had a dip like that in 3rd trimester? I asked my doc, she said it could be my body getting prepped for labour but I wanted to hear actual experiences. Thanks!