Another here who feels your pain. I didn't fly for the first time until just under 4 years ago, nothing bad happened on that first flight except the pilot aborted the first attempt at landing (an earlier plane didn't clear the runway quickly enough - something completely normal and unproblematic).
I can't be sure that's the reason, but after that I was terrified of flying, although strangely not of landing. Its take off that I hate, from the moment the plane lines up to take off until the seat belt signs turn off, and like you OP I hate banking (turning).
I had a very supportive GP who prescribed me medication and even allowed it on repeat prescription which is rare. It was amazing the first time I used it however it's gradually faded and now it makes absolutely no difference. Last time I flew out I took 3 tablets and was as bad as I've ever been, sweating, crying, shaking, and clinging to the hand of a stranger. On the way back I took no medication and was almost completely fine.
I no longer bother taking the meds as it seems to me that if im going to panic, I'm going to panic with or without the meds, so I may as well keep my wits completely about me.
So many people say to me 'just get over it, it'll be fine' or 'planes are the safest form of travel' or my personal favourite 'you're more likely to die in a car crash on the way to the airport' my argument is that you're far more likely to be able to survive a car crash!
I actually fly a fair bit, a return trip 5 or 6 times a year, and I always hoped I'd get better the more I flew but that never happened. However my fear has never stopped me getting on the plane - if it did I'd never see my partner!
Sorry I'm rambling now, sometimes it helps to just write it all down, but just know you're not alone. Control the things you CAN control, choose what time you want to fly, choose what airline you want to fly with, choose your seat in advance. Take back what control you can, and press forward. You can do it ❤