I'm not sure why you need that. Is it a balance thing?

As for fatigue, that is an early pregnancy symptom. Some people have some fatigue throughout pregnancy, but I think for most people it subsides after a couple of months. I would not really try to fight it right now -- there is not much you can do, and it's probably supposed to tell you that you need some rest! For me, it got much better in my second trimester.