I am very sorry for all you have gone through lately!
It's all traumatic enough without the additional financial trauma.
I've had the pleasure of an ambulance ride, two nights in a row. I am glad they were there for me, but the rest of the necessary ER visits that year (12 total) were by private transport. I took my chances.
The siren situation is extremely unfortunate!

My pdoc is retiring, too, after 20 years of working together.
I hope your new pdoc will help out.
You have been through h***!

I hope you get some major relief soon!

WC