Air Sickness, Sea Sickness - Motion Sickness.
After a lifetime of flying military and civil I can still feel terrible after several sessions of 6 turn spins or when flown around by another pilot in an un-cordinated manner.
Those who are discomforted by unusual motions obviously have the greatest sensitivity to the lower thresholds of small motions. They will feel what an aircraft is doing soonest and have the potential to be the better and smoother pilot.
As soon as you get the feel of stick and rudder your senses will know what to expect and there will be no motion sickness. There is a nervous feedback loop in there somewhere.
Go for a flight with someone doing areobatics - you and I will always have to have a sick bag handy! Do them yourself and then the someone may need a sick bag.
Let us know how you get on.