I’m dying - what are some good anime that explore this?

I’m terminally ill. I’m looking for some anime that explore this a bit. Really any genre is fine as long as they are a bit more heavy and explore death, sickness, sadness, etc.

EDIT: This blew up. I cannot respond to everybody but I am reading them. You’ve all given me some amazing shows. My backlog is now crazy big. I’ve seen some but there are tons I haven’t seen yet!!!