Everyone has a story to tell after their first flight.
Funnily enough my first flight experience was not really that bad, I was surprised myself. I didn't feel scared,there was no stomach movement and I felt really comfortable.
Next time just free your mind and enjoy the process.
I wonder where you traveled to that time for your first flight.
The thing is, I was very young then. Maybe 9 years old. I think I may be able to manage now that I am way older. We'll see how it turns out. I do plan to take a flight soon.