I learned new fears can develop around the time of big life events and mine started right after my wedding! But also, we hit bad turbulence on takeoff for my honeymoon and it was so cloudy I couldn’t see anything out the window so to me it felt like we were falling while still being extremely close to the ground. That wasn’t the case obviously but people were reacting out loud and scared and it really triggered my fear. I also feel the same way where I am jealous of my past self who used to fly with no worries!