I am really sorry to hear fo all your pain. THe fact that your H is interested in many women can tell you, it's not you, it's him. Just tell yourself he's insane.
Now, about your Daughter. I'm very concerned. She says that your H acts different when you're not there. And she is cutting herself etc. He tells her things she's not supposed to tell you. I wonder if there's more to this story. I wonder if she's keeping more things to herself than she should.