I don't fear the actual flying. I know it's the safest way to travel and I'm not afraid of death anyway. I came to terms with my own mortality many years ago.
The thing that scares me is losing control of myself again. It's kind of fearing the fear if you know what I mean. There is nothing tangible that I'm afraid of in the plane. It's just the fear of confinement.
I get the same thing on the Tube but I manage that because I can always alight at the next station and leave if I need to.
I have issues with any situation where I'm either physically prevented from leaving or metaphorically prevented.
The thing that scares me is losing control of myself again. It's kind of fearing the fear if you know what I mean. There is nothing tangible that I'm afraid of in the plane. It's just the fear of confinement.
I get the same thing on the Tube but I manage that because I can always alight at the next station and leave if I need to.
I have issues with any situation where I'm either physically prevented from leaving or metaphorically prevented.

I'm not sure what options you have available to you but going to your local GP will definitely be a good thing, unfortunately as you're probably aware the mental health provision within the NHS is chronically over subscribed. Your GP would typically refer you to a local mental health unit where they do a phone consultation to understand a bit more about what's going on before looking at treatment options (whether that's talking therapies, medication etc).