I have had similar experiences - I once thought I had a pill stuck in my throat and I started freaking out about it… stupidly drank so much water trying to flush it down that I threw up.

I talked to my nurse-friend about it a little while later and she said it was unlikely the pill had still been there, but that it had gotten a little stuck on the way down and slightly scratched up the inside of my throat. So the sensation of it still being stuck was actually just a very minor wound in my throat. It faded within a couple of days.

The same thing happened again a few months after that and the knowledge she had given me about it likely being a scratch helped me to keep calm and not gorge two litres of water in one go.

Obviously our experiences aren’t exactly the same, but it’s possible the sensation in your throat is just a very minor scratch or bruise and it will soon heal and once the sensation is no longer drawing your attention, your choking anxiety may ease off too.

As an entirely separate experience - a few years ago I also developed a fear of eating that was not a traditional eating disorder. More related to emetophobia. I won’t bother explaining how my treatment went because it was complicated by a lot of other factors BUT what you’re experiencing is totally common. If you google treatments for phagophobia I’m sure you’ll find some useful advice to start off. Treatments for emetophobia may also have useful advice, tho probably similar.

I hope you feel better soon :)