I'm sooo tired...

I used to drink 2-3 cups of coffee each day and now down to 1(actually as of this morning, none...the smell of it made me nauseous) and I'm so darn tired. I'm 5w4d pregnant...any suggestions for a natural pick me up?!  I work all day and then have my 2 kiddos when they get home from school so no rest for the weary. My hubby is a great help though so I at least get to put my feet up...but no actual napping. 😔