I'm so glad that you know that there are people depending on you! I'm so sorry about your mother. :(
One of the things that helped me personally was realizing that I was really only fighting against a few neuron cells who weren't doing their job correctly and that, like many things that aren't doing their job correctly, you could fix that. So in my head I "fired" those neurons (haha, it's a joke because neurons fire all the time) and taught the new ones how to be. And I re-trained my brain to think positively, not negatively.
And it did pass. :)