That sounds like a bad situation, and I hope it works out for you.
Here's what happened to me in my first 12 months of sobriety around work...all the things I was afraid of actually happened. Ended up out of work and unable to work for 18 months. However I found I was still able to stay sober.
I know that sounds like a crappy answer but actually it was a blessing for me...I learnt that my physical sobriety wasn't dependent on the things around me so much as my internal state...wether I was willing to accept and deal with the things that happened around me.
My work today (second career) is a lot more physically and emotionally challenging than what I use to do...but I love it and I'm far better able to cope with the demands while I am physically sober and have some distance from my last drink.
This came in stage though...I just had to deal with each stage as it came. The first time I managed to get a good night's sleep without worrying about that 5.00am start in the morning and whether I would be up in time...absolute blessing
P