I forget, does she work in a practice where you could check with the receptionist or a colleague? I think you could just send her a very brief email at this point, like, "Hope you're doing OK. Let me know what you think your timetable is of being back." I just know some T's try to let the client reach out, so I'm hoping this wasn't a case of miscommunication, like she thought you'd be in touch with her. I'd be going completely nuts at this point, so I understand. But still I think a brief email would make sense. Even something like "Just checking in, hope we can meet soon."