I would guess it will sort itself out with time. The more you get used to flying the less you'll get sick.

I've personally never gotten airsick, but I used to get seasick alot. But after a while on boats it fixed itself. I guess it's just something your body has to adjust to.

In the meantime, if you feel the sickness is jeopardizing anyone's safety, I would suggest finding a non-narcotic airsickness treatment. Does anyone have experience with those little pressure-pad wristbands?

Also, try leaving your window open for the duration of the flight, make sure you're getting lots of fresh air, take deep breaths when you feel you're getting sick, don't fly on an empty stomach, and get a good night's sleep.