A Bug or Post-"Vay-cay"-Malaise?

Oi. I cannot seem to get going here since we returned home on Monday! Yesterday I truly felt drugged...like I had taken a mega-dose of Benedryl or something! I took three naps and then proceed to go to sleep at 9:30 pm, sleeping (except for the brief awakening by our neighbors, the "McParties", in the middle of the night) until 7:43 am! Ridiculous. No one but dogs and newborns sleep this much.