jetlag or insomnia?

ever since i came back from asia, i haven't been able to sleep well. (except for the first night, which i slept from 1am through 2:30pm the next day... that's not my personal record, though.) for the past 2 nights, i'd fall asleep around midnight while watching tv and wake up just after an hour, realizing that my lights were still on. i'd be wide awake by then and it was difficult to fall back into sleep again, so i tried putting on my tivo'd shows, listening to soft music, or reading a book. i seriously even counted sheep. but for both nights, i remember seeing the (sun)light from my window before falling asleep again. of course, the next time i woke up would be past lunch time.

i've never experienced such bad jetlag previously. i wonder if it's... insomnia? maybe i have a lot of things on my mind lately...