need someone to talk to

So, I'm not really sure where to go to talk about this, so I figured I might as well go here. This is going to be a little long, so bare with me. 
Recently, my grandfather passed away. When he passed, my grandmother started doing things that no one wants there family to do. We don't talk anymore and she has nothing to do with her daughter or grandchildren. Between my grandfather passing and my grandmother doing this, I got severely depressed. I've gone to the doctor and been out on medicine for it. On Monday, my dad went to the doctor. He found out he has cancer and probably isn't going to live much longer. This was such depressing news. I'm not ready to lose my dad, and I don't want to see how my mom handles losing her husband. We want to be able to let him do this things he has always wanted to do, but we have no money for it. It is just depressing me even more and I just want some helpful comments and someone to talk to..