I do feel for you.
High School is a massive adjustment for a child this age - some adapt better than others.
The good news is, every hour she spends at her new school, the environment will seem less strange and threatening. Your daughter will start to pal up with others who feel the same way, and in tandem with that, she will start to get used to hjer new place and new routines.
Have a word with her Class teacher and explain your daughter's settling-in issues, and ask the teacher to keep an eye on her and advise you of any issues. First Year teachers have vast expereience of new pupils adapting to their new school, and he / she will be able to reassure you.
The best news is, this difficult period doesnt last long, so be patient. When your daughter gets home, give her lots of cuddles, and make sure she feels safe and secure - especially in view of your health and domestic situation.
I wish you well with this issue, and your future health.