Hey growlithing, I just wanted to say you're in my thoughts.

I'm really sorry for your guinea pig... Losing a pet sucks.

Oh, and your mother sounds like she has MANY more issues than you do. Mocking someone for being hospitalised?! Pathetic. Even more pathetic if she mocks her own daughter about this(or anything really). She should really see a therapist. I'm really angry at her and I want to send you a big warm hug.

Lean on your friends, they can help you through tough times. And on us, if you wish. I believe we all care about you and don't want you to die.
Is your dad around? Maybe he's sane enough to support you.
Here's a song for you to hear: