First trimester & A toddler

I have a 16 month old daughter and I’m pregnant with baby number 2. I’m so exhausted, and I can’t keep up with the house work these last couple weeks. I’ve found myself dosing off a couple times, and I can’t be doing that with having to watch my daughter all the time. I’m a stay at home mom during the week and work 2 days on the weekends. My husband works 3rd shift and 10-12 hour shifts during the week, and sleeps up until an hour before he has to go to work. What something mostly natural that could help give me energy?