Just go to bed and get a good night’s sleep - and she should do likewise. Her luggage will get to her in the next day or so.
When I’ve gotten separated from mine, I was actually happy not to have to drag it around. The airline knows where it is and where you are and they will bring it to you.
Not always so simple. I went to Florence Italy and my luggage got held up in Paris for many days. Had it not been for a friend who worked for United, I’d probably wouldn’t have had my luggage till after my vacay.
I went shopping. But i went there for a wedding and had certain clothes I needed for the many events.