I have zero energetic. help me!

Danielle • 4th pregnancy. 1 miscarriage. 5 year old girl and 2 year old boy. 💙💖 Due January 2018!
I am exhausted when I wake up and all day following no matter what. How do I fix this so I don't lose my job and I can start doing my life again?! I'm not a coffee person fyi