I was so sorry to read that you have not had support from those around you in your work place. I can't even imagine how hard that must be. This is a time where family is everything!
My last chemo treatment was in June so I am not quite a year out. I have not suffered from depression and for that I am really thankful. I think a large part for me is my faith. I spend time every morning having a quiet time with my cup of coffee and Bible. It gives me tremendous peace.
Here you are just a year out and now your mother has breast cancer. I wish I had some wise words for you but I don't. You are obviously a person of tremendous strength to have endured all you have. Just know that many here are reading your "story" and sending thoughts of healing your way.
I wish you peace...