This is rather late, nonnie, but when I went through a major crisis a while back, I found it was really hard to predict which people I found it easiest to approach for help (as well as which ones responded best). So my one bit of advice would be to listen to your gut -- if the thought of asking for help from your sister or best friend or whatever feels impossible or doesn't feel right to you, think beyond the most obvious relationships. Just look at your address book or whatever and see if there's a name that feels like the person you want to e-mail or call.

To this day I have never discussed the depression I went through with my brother, but a former supervisor of mine and a friend who up until then had been not one of my closest became amazingly supportive go-to people for me. Going through something big can really change your relationships, and change which people you relate to most.