And I agree with the others. This is time to reach out for support, to think about your own recovery and to cry as much as you need to. Right now, to the extent you are able, try to be easy on yourself and coddle yourself.
Even though it is not the time to face the reality of the situation you find yourself in, I will write a little bit to at least start the conversation, for when the time comes to deal more directly with the reality of things. Because the foundation of all of this, is that her choices most likely have not a thing to do with you.
Our kids often blame us, and hurl responsibility on us, for mistakes, or doing this or not doing that. Healing will come in large part from making strong boundaries, and recognizing that NOW she is responsible for herself, and you for yourself.
Because laws differ, depending upon where you and she live, there may not be legal ramifications. But as says Crayola, if there are, for her own welfare she cannot avoid any legal consequences.
Most of us are in your situation where our beloved children behave, make ethical decisions, and have attitudes with which we do not agree, which may cause us shame, and which frighten us terribly.
None of us really knows what is the right thing to do at any given moment (If we think we do, it is about other people's children--not our own.) All of this is what unites us--our fear, heartbreak, lack of understanding, indecision, inability to relax, and our self-blame and self-doubt.
The thing is you do not deserve self-accusation. None of it. And it does not help.
Let me address for a minute your daughter's choice to participate in the sex industry. Attitudes of young women can be very different from our own. Those that think this way may see this as a legitimate life style choice, as empowering, and a business decision. (*I will editorialize here: How could they? I do not know.)
But attitudes have changed. These same women may see the compromises that we have made in relationships and marriages as questionable and undesirable.)
Now. If drugs are involved. Or if she is doing this for self-abasement. Or because she is being victimized or under the influence of bad people. That is quite another thing.
At the end of the day, we all of us, have to figure out the extent we have any control over them, our adult children. And until your daughter is ready to change, what actually, are your choices?