Is anxiety causing this feeling?

This has been happening for some good few weeks now, everytime I eat something, I always feel like the food I ate ends up sticks in the middle of my esophagus. I had cake yesterday and I started panicking since I took a big bite of it and it wasn't properly chewed and my throat automatically swallowed the food. I started worrying about it all day and start panicking since my throat will feel so tight and I would get this choking sensation all day and I keep thinking I might end up dying, but I'm still breathing, eating and drink normally. I hate how this happens mostly and I do suffer from generalized anxiety disorder, my doctor keeps trying to tell me that my anxiety is tricking me into believing the food is stuck inside my throat and is making me feel like I will choke to death, even though I'm not. I can't stop thinking about this sensation. This is not the first time. I do feel mucus as well and was wondering if it could be the mucus as well making me feel like the food I ate is still stuck. I have rushed to the ER a few times when I feel like this, but they never really found anything and told me it's mental. How can I tell myself and calm myself down that everything will be okay?