Welcome to the forums. So glad you posted here and found it to be a helpful distraction. This is a really good place to share thoughts and ideas with others who are going through similar experiences. You've offered some advice on what works for you, so thanks for that - I haven't done a crossword in years, but I used to love them!
It's great that you've tried talking to your family. Sometimes, though, people aren't quite sure how to help us. Have you considered seeing a professional to get some help? How would you feel about that? Does your school have a counsellor? That might be a good place to start. Otherwise you could try phoning the Kids Helpline, or talking to your GP. Anxiety can certainly make it hard to do the things we want or need to do, but there are strategies that can help.
You mentioned your anxiety is related to being sick. Have you had an experience where you've been sick before, that's brought this on?
Chat more if you like. Katy