I got 'sicker than a dog' on my second GA instructional flight and went home and laid on the couch and wondered what I was going to do next!
It was a brand new environment - but weren't you pretty nervous the first time you ever got in the driver's seat of a car, behind a boat, on a jet ski, etc.... - and I don't think any of those compare to an airplane!
Give it some time.
If those feelings don't subside after a period of adjustment time, try a different CFI, try training in a different aircraft, try training in location if possible if part of your discomfort is environmental; but as RickAir said - "noise, vibration, bumps, sensations, and angles " - well that is GA flying.
It isn't for all, but if is for you, it is a ride!