I am glad you are feeling calmer.
I understand why you think this, but I think that a new environment, with adults she isn't familiar with, might be enough of a fresh start for her to sort through all this. It isn't ideal, and if it was my daughter I would be climbing the walls worrying, so its easy for me to tell you all this, much harder to do it.
Maybe she has dug a hole and feels she can't back down, but maybe she actually feels like this is what she wants, no matter how crazy it seems to us.
I left home at 17 too. I walked out and didn't go back. My parents didn't know where I was, and quite frankly they didn't care. They didn't look for me, call the police, or even call me. (Of course to their friends they were devastated and couldn't understand why this was happening to them.
)
From your posts it sounds to me like your daughter knows you are trying to contact her. She knows you are there. All you can do is keep the door open, keep the same number etc, keep asking her dad about her so that he tells her you hope she is ok. If she feels like a conversation with you will turn into you trying to convince her to come back she might avoid that.