first i will say...i am very sorry for your circumstances.
next, you need to evaluate the place you work, and see if it is really where you want to be.
most people think they can endure and overcome acrid work enviornments. even change something about them. but unless you get into administration, you cant change that, sometimes not even then.
take a good look at the letter you wrote, would you want your mother, sister, friend or daughter(future thoughts) .. your boyfriend or your dog to be in this enviornment .....feeling this way?
then why are you?
i have told people hoping to inspire change within them(and for a few it works)
people are exactly where they want to be in life. if they weren't, they would work to change it.that means, you want the things you have, otherwise you'd change it.
look for an opening, re-evaluate your assets and jump on the next train out of that department. it may not come right away, it may be a few months, but for your health, your relationship, and for the good nurse that is inside you, you need to get out.
knowing there is a light at the end of the tunnel that is not a train speeding towards you can often lighten your feelings of sadness and burn out.
save yourself. you wont have anything if you dont.
and yes, i can see those feelings and recognize some of them in myself. i changed what i was doing, went in a totally different direction, even switched shifts. 3 years later i was back on my feet, ready to run, and motivated again. now i am advancing myself and cant see an end to the good things that will come my way.