Vocal cord dysfunction

Welcome lae...I haven't personally experienced anything like this but do suffer from Gerd and it does make me wheezy from time to time.
I'm sure someone will pop up with advice who has.
Anxiety can really make you think all sorts is wrong when it's just anxiety.
The top of the page has resources that are really helpful. I find deep breathing when stressed can really help.

I have been diagnosed with VCD. It started off just not being able to catch a deep breath. My doctor at first thought it was anxiety. He sent me off for tests and to the allergy doctor. She thought of VCD right away and sent me to a speech therapist. She put a camera down my throat and could see it. I had speech therapy teach me how to breathe properly for months. It helped.

I still struggle with it now and then and anxiety doesn't help.

I would say my anxiety set in deep when this happened and has taken a long time to calm itself.

It took a few months before my diagnosis so anxiety took a deep hold. However, my allergy doctor wasted little time sending me to a speech therapist. Of course you have to wait a month before you can
get in there.

I recall a tiny straw exercise and a large one. Mostly she taught me how to belly breathe. I also visualize my throat opening and closing, as it should, using an image of a camera lens. I also breathe in thru my nose and with slightly open lips, in a 'o' shape blow out.

When I can't get a deep breath now I use the gulp of air technique to open up my throat.