AKC:
Hopefully you've sorted out your school stuff, but in case it helps I am a professor and I have had many students come to me to speak about the kinds of issues you're dealing with. It's far more common than most people know, so your Dean will be familiar with it.
Also, what I tell my students is that what matters most is that they get back on their feet emotionally, and that the coursework comes second. Don't put too much pressure on yourself in these kinds of circumstances, life will go on just fine if you have to restart some courses. People do it all the time for all kinds of reasons, it's not that big a deal, take it from me. The big deal here is getting yourself recovered, let that dictate the timing of things, not the academic calender. I wouldn't tell a student with cancer to worry about finishing courses (and I've had that situation too) so why would anyone expect someone with an equally serious emotional condition to be able to do it either?
Finally I remember one of my happiest days was seeing a student, who I had seen in extreme crisis, walk across the stage to get her Master's degree. I've seen a lot of my students graduate but that was a very sweet moment for me. Don't underestimate how much people are behind you, and will want to work through this with you. And don't think you have to be superhuman. Just make it, however and whenever you can, I guarantee we'll all be happy for you.
Ava