Insomnia first week post op

i have had the hardest time sleeping since surgery last Friday. I have so much energy I am bouncing off the walls. Is this normal? 

For me it wasn't about energy, i think it was a lack of activity. I ended up getting liquid zquil (ok'd by doc) to help me fall asleep. After i got back to work and exercising regularly, no problems falling asleep...staying awake, now that's a different story