Have a look at Lisa Damour’s books on raising teenage girls and listen to her podcast. She’s very good.
Sorry you are going through this op. It is very hard. You have to focus on the fact that this is a phase and you will both emerge from this ok but it may be when she’s eighteen or nineteen when things start to improve. So in the meantime you need support for yourself and support for your dd.
In order to individuate as an adult, your dd has to cut herself off from you and that involves rejecting you and your values. This process is painful for her. Your job is not to follow her up and down the emotional roller coaster but to step back slightly and just be a steady rock while she rages all around you. Don’t get tempted in to the petty arguments and rows. Step back, step out, step away. Only engage when she is being civilised. Be calm and tell her that speaking in that way is disrespectful and then leave the house if you have to. Let her figure things out for herself and suffer the natural consequences of making the wrong choices.
I am sorry your dh is not being more supportive. He should be a team mate, not acting like a referee. This is very common though with the father> daughter dynamic.
Most important though, try and get your dd to see a therapist who is familiar with ND. And try and get her assessed. I know that’s easier said than done.
And op, this is going to sound harsh but you need to model calmness, and a realistic level of positivity and cheerfulness. She is watching you and how you are responding to this situation.
Do what you need to do to make yourself feel better: go out with friends, exercise, buy a dog, start a hobby that brings you joy. Let her see you living a happy busy life. Be a bit selfish and don’t let this negative interaction between the two of you spiral down and become the sole focus of your daily lives.
Make it clear that the lines of communication are open, try and have small moments of pleasantness between you, take her out for a coffee or go out to lunch, and make sure she knows she is loved (teens need to hear this often however vile they are being) and then step back from top down parenting and switch to running alongside her and cheering her on and advising (if asked) from the sidelines. No longer “you should do this” but “I’ll be interested to see what decision you make about this”.
Good luck op. This too shall pass!