I was soooo tired and unmotivated too..... but I managed to do what I had to do to get through the day. As long as I was sober I felt that I could deal with the other stuff and it would get better.
At about 3-4 months (and I know this is different for everyone), my energy not only returned, it's been better than it's been for a long time.
Just take it easy on yourself - you'll get there!:ghug3