Dude, it's normal. I'm in USAF pilot training right now, and we have guys that get sick here too, and believe it or not, many of them get over it to go on and fly fighters.
Couple of tips...
1- chew gum
2- It's 100% mental. If you KNOW you are not going to get sick, you won't. Make your mind overcome it.
3- Keep yourself busy. Fly the airplane yourself (it helps your brain comprehend what is happening) and keep your eyes outside. Talk to your CFI and stike up conversations to distract you from your situation.
4- NEVER think "I feel sick" or "I think I'm gonna be sick...".
5- Breathe deeply from your diaphram. Push your belly all the way out when you breathe in. This really helps.
6- (may not want to try this one) I heard about a guy in USAF pilot training that kept getting sick, so one day he decided to pound tons of water a few hours prior to his flight. When the time came to get in the jet and fly, he had to pi$$ so bad, the last thing he tought about was puking! But you may not want to try this one, because it could end up in disaster in more ways than one...
Keep on truckin and get through it. There are very, VERY few people that can not adapt. Seriously though, almost everyone feels a little woosey their first couple times. It usually goes away in a few flights, but if it doesn't, don't worry, follow the above advice and you'll be ok.