Up All Night

How do you keep from raising your voice all the time?  Do you try?  Can you?  How many questions can I ask in the first thirty words of this post?

N is 4 1\2 going on 15.  She seems to have reached peak annoying for me at the moment.  I find myself trying to find excuses for her to have to go to bed early.  This is not usually that difficult as part of her problem at the moment is that she is exhausted pretty much all the time.