Lost a friend 1.5 weeks ago

This is my first time on the site, so I apologize if I'm doing this wrong.

I found out a week ago yesterday that a friend passed away suddenly in her sleep. She had just turned 30, and left behind her husband and twin 1 year old boys. I was able to make it to her funeral but I don't think I'm feeling any sense of closure. From what was said at the funeral, the autopsy was inconclusive. So there may never be answers to what caused her death. To go to the funeral I had to fly to a different state and deal with my parents, which is a whole other issue. I just don't know what to do. This is my first experience as an adult loosing someone.