You are asking things that only a doctor could determine. I do believe your W has serious problems that stem from her past. I do not know that you have what it takes to endure the length of time her therapy may require.
You say she acts like a spit personality and when you see the warm side of her that is when you melt. You've proven that more than once, and that is why you are not showing the strength in a man that this woman needs. Yes, she has a lot of problems, but you are responding such as irresponsible to her actions as she is in hers. In your mind, you are doing the best you can, but what I'm saying is that this is a tragedy waiting to happen.
Just like her grabbing those pills when you were making that call. If the two of you keep going like this, she is going to act out on one of her dramas and nobody will be there to rescue her in time. She is desparately trying to have control in a life she feels is worthless and has gone haywire. But, everything she does goes south b/c she doesn't have the proper skills, apparently, and things keep getting worse by the day.
I know you want to help her, but I think you need to back away and stay away from her and let the doctors help her. Of course, you've been told to leave her alone....to back away....to detach, but you have not done that. You act as co-dependent on her as she is on you. That is why I think you need to be in IC, also. But, you need to work on your problems and let her work on hers and the two of you leave each other alone. Some day.....far, far away, maybe the two of you will be healthy enough to come together. BTW, have you checked the degrees of this C? B/c if this is some C off the street, I assure you that more damage can be done in a short time, and your W can't afford for that to happen. She needs "real" professional help.
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!