How sad I am to read this, I can imagine what your daughter and you are going through. Not only do I have Bipolar and I did have to be hospitalized for it two times, my dad also had Bipolar and was hospitalized for it numerous times. Bipolar is treatable yes. There so far is no real cure, just treatment. There is Bipolar I and Bipolar II. You'll have to read up on the difference. She may be having a Paranoia of some sort from your description. Perhaps her medications are causing some of this paranoia. Remember sometimes some psych meds give a person voices that give them suidical thoughts or thoughts of harm or danger. Not only does sometimes the illness cause that, but I have read and heard so very many times how the anti depressants can also cause that. Some people do indeed over dose on purpose. Some actually survive and some don't, so it is a big danger for her.
After her inpatient hospital stay, your daughter will obviously need psychiatric watch closely and perhaps counseling. She may need assistance with someone such as a group home to watch her with her medication and her paranoia until such a time that she can again be on her own. They usually don't let people that are a danger live on their own, until they are safer. Remember this is all temporary, she may later down the road improve with the medication and the correct treatment. It takes a long while to get those drugs to work sometimes. And many times there are plenty of side effects and one of them is a big weight gain. I feel so bad for both of you, as I can imagine what you're going through.
As far as taking care of herself and running a life on her own and paying her bills, that all may come later when she is in a more stable condition. She may be a totally different person at work, especially if it is in the day time. She may tend to be worse at night or when the sun goes down? That's usually the way it tends to be. And her unorganization that just part of the illness and don't be concerned about that right now, just keep her from overdosing.