Greetings and good thoughts from a fellow anxiety sufferer.I know how totally vile that feeling of dread can be,especially when there seems no logical reason for it.See the fact that you are at least leaving the house as a good thing,even if it feels like hell---I've forced myself to go into town and shop,even though I've ended up weeping in the queue for a taxi.There's nothing wrong in going NOWHERE for a day or two if it feels really appalling.Are you taking any medication for the anxiety?You say the ENT Dr you see is helpful,but do you trust your therapist and feel at ease with them?With your worries about physical symptoms,a dual approach seems a good way to go.It could be that anxiety is manifesting itself as physical symptoms,but not necessarily,of course.I have gone through phases of thinking I had cancer,MS,etc.One obsession goes,another one arrives!
When I'm out and I feel the dread and terror increasing,I literally talk myself home("here's a taxi rank,you don't have to have any conversation with the driver,not far now, soon you'll be in a safe place etc.Talk to yourself as a friend would)Maybe write down what triggered the panic,if you can.(I know that sometimes there seems no reason for it)
Try not to read too much medical stuff on the net---I've done this many times,and have sometimes found I fit every psychiatric diagnosis going.Result of this is anxiety going through the roof!I find this a bad thing to do when I'm already terrified.
I hope you have a doctor you can trust.There's no shame in taking medication(I can honestly say it's saved my life more than once),and in the long term some kind of talking therapy can do real good as well.Mix and match.
I speak as someone who lives in the UK,so don't know what access you have to the kind of services I've mentioned.Sorry if anything I have said is inappropriate.(Whooops!My anxiety is showing!)I would love to hear that things are improving for you.Keep posting! And LOOK AFTER YOURSELF!