Hi....I did have some issues with breathing....and yawning but not the same thing you experienced....I would get a really tight sensation in my muscles of my throat when I would yawn...hurt like heck....almost like the muscles went into a spasm of some sort....
My breathing issues were again not the same as yours....but I know we can get them....how far post op are you now?
I'm about 10 months post op. So I was surprised when the Er doc told me to check withy neurosurgeon.
In 10 months time frame you are still healing on the inside as it can take up to 2 yrs for the nerves to heal and longer depending on if you are a slow healer like myself....
Scar tissue can also form and cause issues so deff see your NS. and let us know what you find out.