I bet your dog was pleased to have you home too. Sometimes the mind plays odd tricks on us making us feel the opposite to how we think we should feel.
I understand your feelings because I am suffering a bad case of buyers remorse at the moment after buying a new car. I can afford the car, my old car is getting old and in the next year will need some expensive maintenance, I've never had a brand new car before (This car has been pre-registered so technically I am the second owner, but the car has 2 miles on the clock). I should be excited but still I'm wondering whether to cancel (there is a 4 day cooling off period).
Sometimes we just need the reassurance of the familiar.