I just got back from almost a month in Mexico. I never usually get jetlag but...
This time was savage. A perfect storm though - for the few days prior to coming home, I was partying very hard. Little sleep for about 2 nights or so, culminating in not going to bed at all and getting hammered then getting a 6am boat back to the mainland to commence my journey home. I'm usually good at sleeping on planes but....this time, I had a 2hr flight to Miami, so no sleep; then a few hours hanging in the airport, no sleep; then I somehow broke through the wall and couldn't sleep at all on the 9hr flight home.
By the time I got home, I think I hadn't slept for about 30hrs in total, maybe more. Jetlag then had me sleeping by 8pm every night and up at 4am for about three days. Rough. My stomach was out of sorts, too.