I don't get to have siestas at all. My body isn't used to sleeping when the sun's out no matter how I try. Is that just fine?

Me, too. I feel uncomfortable not being on the go as a stay at home mom. But I have learned to just STOP and sit for about 20 mins, or better yet take a power nap even for 10 mins. This really helps for me as I get to think and do better after resting.