Welcome to our community laudi.
What a difficult time for you and your family - difficult probably doesn't even begin to describe how you are all feeling. There has not even been time to grieve your father.
Another member Sissy started the thread scared and lonely after her sister was diagnosed. My twin brother, heather2408, Carlyn and NatR has also posted to that thread. I thought you might find it helpful.
The article, Rituals to Comfort Families might be helpful as you care for your brother and mother. It must be so hard to see your mother so sad and know that nothing will fix that pain. However, I do believe that your presence will give comfort -
I’d encourage you too, although I know it might be hard, to care for yourself too laudi. Maybe a walk outside, or resting in a peaceful corner.
You wrote you came out to help your brother - do you live in the same community as your brother and mother or is that making everything more difficult as well - being away from other family?
This is a good place to come as well… sometimes knowing you are not alone can make a difference.
Take care
Katherine