Ethansa,
It's quite a common thing that I've observed with 'early' students during their flight training. In all cases it went away after the particular individual had adapted to flying. One of the worst sufferers that I knew went on to become a very proficient aerobatic pilot.
I don't know if
DX Wombat's ginger works for you, but if it does then give it a try. Be careful to not use the commonly used 'air-sickness' medications usually prescribed for passengers, these can make you rather sleepy and somewhat detached from what's going on around you.
If the problem continues, see your GP and investigate the possibility of middle-ear infections etc., the symptoms that you describe happened to me without warning somewhere early in my own flying training, all of which was rectified after a course of treatment for the middle-ear infection that was causing the problem
Regards,
Old Smokey