It is always so sad to hear about a death case, mostly if it is your mom, l can understand how you feel now, as l feel the same way very often, but l am sure you wont give up, as we can always find our way ahead even if it seems to be so impossible...
I have been having many many death along my way so far, and now l can see as if l didnt have anything else, only the memories of those who once left me in so disgracefully without the possibilities to saying a Good bye to them and l have to live with the awareness of this all till the end of my life...
I often feel so l have left nothing to live for anymore...
But somehow l get up every morning again and again trying to carry out my new plans for that day about what l think that will be completely senseless, and l take notice that with a faint resignation as l get out of the bed, ow, alas, how often l feel so depressed and lonely... but l try to find something beauty in the world - as you are doing it so well with your sunsets - then l come here often to talk with my pals, and if you eventually like my pictures, well, that is really very very cheerful and sometimes l feel, this is enough to me to survive...
I think you should make only daily plans for yourself, and try not to look into the distant future, this can be so frustrating and if you will be able to complement at least a little from your daily aims, that will give you a great time, and that is really cheerful.
This is only my experience and this is not an advice, but it has been quite acceptable to me so far and l think this might be useful for you too or at least may be it would worth a try...

Going to learn something mental then maybe can teach your body physical
it should be worked theoretically, if there is no medical objections of it,
and as l know some of you  already have had some sucesses in it, due to the result of 
your daily hard work...
We are said to be working by our own signals what we are sending to our 
brain, l mean if you decided, you will have a nice day, then it is a huge 
possibility that you really will have, and it is true reversely also.
Consequently if there is no medical objections against it, actually 
we can programming ourselves for several things.

This topic is so exciting, l would wonder of the experiences of other
members, please write!