Can someone explain the reasons why enneagram 5 isolates vs why enneagram 9 isolates?

I'm trying to find my type and I know their differences but I'm still not sure. Most of the time I isolate myself from the world because I can't deal with it or because I don't need it and I rather do my own things,but I don't think that avoiding situations fearing I can't handle and treating my emotions as a separate thing is enough proof to type myself as a 5. I have spent the last 2 years without seeking any knowledge and neglecting everything,narcotized just as the descriptions of a 9. I don't know if its sloth or just my depression. Should I consider the period of life when I was healthy?