I would say, encourage her to talk. Spend time with her, where you are close physically.
In that space, you have an opportunity to make bridges where your intuition of what is happening with her will become stronger, and she will have a chance to relax with you, in meaningful ways.
Inside, behind the trembling lip, is the same person who kissed your booboos and has always been there for you.
If she needs to go to the doctor, be firm with her and take her. If she does not want to go and the doctor cannot help her (sometimes this is a fact), then do not force her.
It’s a tough space to be in with a parent who has been in charge, as you find you must assume that role. I haven’t read your other entries yet, so there is a lot I don’t know about… Hope this is at least a little encouragement along the way.