good luck in your new journey, i had same horrible night of the surgery 9/19/12, but now I'm almost 2 weeks post surgery and feeling great, in the mornings i have all the energy but starting at 8pm im exhausted and need to sleep, the only bad thing about sleeping early is that i wake up too early 5am sometimes earlier and can't sleep afterwards :-/
again stay focused and good luck on your new you !!!