Post travel woes

So, I spent over 19 hours "at work" on Thursday. It started in Houston with meetings at 7:00am Central (that's 5:00am Pacific time). We were in meetings all day until 3:00 or so. A quick rush off to the airport and then on the plane by 6:30pm. 5 hours later, we were landing in Vancouver. I finally got home around 10:30pm. And by the time I had a shower, I finally crawled into bed around midnight.
I had Friday off of work, but I spent most of the day on the couch. I was so dizzy!! I'm not sure if it was dehydration from the travelling, or from the altitude changes on the plane, or what it was. But it was very disconcerting. The dizziness finally faded this afternoon, and I started feeling better.