Sorry, GW, I know that a pet is like family. I had to have my dog put down after ten years and it was very emotional. When it's added to stress that you are already carrying around, it does hurt. Unfortunately, your WAW does not want you to comfort her and you are correct in how she probably sees your physical muscle problems. It is simply cold-heartedness on the part of a WAW. Seems like everything about their LBH turns them off. So, while you are suffering from the loss of your beloved pet and from your shoulder, I think it would be to your advantage to just leave her alone. It's hard, I know. My H would never turn to me in times of sorrow and so I know how it feels, but you learn how to cope.
Instead of thinking of everything that is going sour in life right now, try to focus on just getting through this day and you'll take tomorrow when it comes.
I've had to face some sad times, as I'm sure you have also, but I've learned that we do get through it.....and that better times will come. Don't give up, friend. You are stronger than you give yourself credit. BTW, you can let your feelings be know to us anytime.
Take care.
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!