Ethansa
Sounds like your describing my first trial lesson completely!
I had this nauseated feeling from the wing-overs done (at my request) by the instructor.
When I got back on the ground I had very mixed feelings. I was really disheartened because I (like many other people) had set my heart on a career that frankly I hadn’t any experience of.
Somehow, after my first trial I wasn’t sure if I wanted to pursue it anymore. Deleting a dream from your life makes it feel a little empty for a while!
I too was scared that this lack of enthusiasm would persist in to my PPL but I decided to go for it anyway and haven’t looked back - loved every minute of it. I managed to revive my dream and I' m still working towards it today!