I can really sympathise with you, Iím also 28 and my anxiety is also to do with eating, though not due to issues swallowing.
I also turn down any invitations where there will be food there, so pretty much anything! Iíve also tried CBT, hypnotherapy etc and nothing has worked so far.
I had to post to you, as I saw a programme on TV the other day which was about a man with swallowing difficulties. It was on ITV if you live on the UK, so you should be able to get in on catch up?? It was ĎThe Speakman'sí, they actually Ďcuredí him by the end, but I donít really understand their methods so canít comment on that, just thought it would be useful for you to see someone with a similar problem.