Sometimes when people are in pain what they really need and want is someone to hear them. Rather than offer direct suggestions to your daughter you may need to listen and be empathic to her situation. I know this sounds like you are doing less, but at the end of the day what you are offering to her isn’t being accepted and isn’t helping.
The key to understanding how to listen is by using something known as active listening. It’s requires that you let your daughter talk, and then respond back letting her know what you’ve heard. That is the essence. Here is an excellent article on this Remember, the original name given Freud’s therapy was the talking cure — not the advice cure. For right now being a sounding board for your daughter and be the best thing you can do.