Exhausted

Oh. Boy.

Have I been feeling exhausted lately or what!?

Second trimester was supposed to be the one where I was full of energy and bursting to go but for the last week or so I have been feeling tired quite a lot of the time.
It's not like I'm sleeping all the time and can't do a thing it's just that when I do stuff I get much tireder than I ever have before.

I always feel like I need to sit down, or have a long massage. I'm feeling hungry and thirsty all the time. At the end of the day I feel like I've run a marathon and need some sleep.

Has anyone else had similar experiences?
Have any tips? Do I need to eat more, exercise more or sleep more?
Should I just suck it up cos I'm growing a baby and this is what to expect?

Image Credit: CureZone