Hi Sal
Is your Mum staying with you or in her own house?
You haven't let her down by sending the dog to the farm, you have a lot to contend with at the moment, I'm sure he'll be ok.
As for work, I think they are treating you dreadfully, it's just typical of the system. I used to be a nurse in the NHS and it was the same there, have one day off sick and your name was mud with the sister!!
Had great plans to dust today, even dreamt about it last night, how sad is that! Decided to go out in the car instead and felt much better!!lol.
Hope you will feel better tomorrow
Take care
love Elaine x