Happily ensconsed in Toronto

I am happily settling into the life of my own family in Toronto but am surprised by how fatigued I am. I slept a very sound 9 hours the last two nights, which is much more than the typical seven hours I get in Berkeley. Yesterday, I felt energetic, but after lunch today, I started to feel really weary. What's going on? Am I coming down with something? I need to remind myself that for many, many years that my visits to Toronto were opportunities to sleep and rest. I am somehow able to give myself permission or space (at some deep subconscious level perhaps) to sleep in.