I keep mine under control by wearing a teeshirt and keeping the cockpit cool.. a few of my instructors fly in coats and scarfs and like to keep the cockpit piping.... horrrrrrible.
When I first started airsickness was a problem but with that above method I quickly got used to it. I will admit when I was doing steep turns with an instruct, many lessons after i'd actually done steep turns, I got a hot flush and felt ill. Taking control of the aircraft again allowed me to feel better.
Many people get airsickness but you do get used to it.
