Oh gosh. Four years is a long time to deal with the chaos. I'm so sorry. And to have to move out is just so sad and so hard. But it happens.
I didn't realize this recent doctor diagnosis her with bipolar. Bipolar 1 or 2? Has s/he said? I also go to a site for people with bipolar disorder who are adults (I don't have bipolar but I do have depression). I've gotten a lot of really great insight from the people on this site about what my child is going through and how different medications impact people differently. Some people do great on Lamictal, some depokote, some lithium. It really is trial and error. There are some younger adults there (college students) who post. I'm happy to share the web address if you'd like to lurk there or join. Just let me know. But they are very savvy and empathetic about what they call the "medication-go-round."