I'm so sorry.
I lost my dad to lymphoma about 2 1/2 years ago. Similar situation in that 2 weeks before he died he was feeling better than he had in a long time with a good prognosis. Luckily, my parents kept all of us in the loop on his health so I didn't have to be blindsided like you were.
The best you can do for your mom is to take good care of yourself and keep her memory alive.
The best you can do for your mom is to take good care of yourself and keep her memory alive.