Wow, what a mess. I'm so very sorry that you've been going through all that. It sounds like things are starting to look up for you a bit, so that's good.
How are the panic attacks? That is where my own experience lies. I am currently battling them myself and also just found out that that's in fact what's wrong with me. It doesn't sound like the same thing you experienced though. I fight all day for a deep breath. Once I get one, a minute later I need another one, but it doesn't come. I can see how someone would panic while feeling like they couldn't breath, but for me I get headaches and stomachaches from taking deep breaths all day, or at least trying to.
I finally talked to my dad about it who filled me in on what it was, because he suffers from the same thing. He was given Xanax, in the lowest dosage, which he says will stop the breathing fits for a few hours. That sounds like such a welcomed feeling right now.
As a mother, xanax was not something I even cared to touch. The name just makes me think addictive drug, and I absolutely didn't want to take anything that would make me feel out of it at all. But my dad said the lowest dosage shouldn't make me feel that way, just enough to take the edge off so I can breath. I'm actually considering it, after talking to a doctor of course.
This usually lasts a few weeks and in the past has gone away on it's own, but I never knew there was a way to control it before. I am all too happy for that control.
Best of luck to you. I hope things start to look up even more for you and your sister.