I wish I knew what to tell you about this. You've experienced several serious losses recently but have had no opportunity to process any of them. It sounds as though seeing a therapist would be one potentially important option or, perhaps, participating in CBT or DBT. However, given your circumstances, it doesn't sound as though those kinds of things may be options for you. Of course the other option for severe anxiety is medications. But if you can't even see a doctor without being escorted, I don't know how realistic an option that would be for you either.

Other things people do to cope with anxiety are such things as meditation & increased levels of physical exercise. But since you're feeling your anxiety is "out of control", while these sorts of things can be helpful, they may not be sufficient. Here are links to 6 articles, from PC's archives, that provide information on treatments for anxiety as well as offering suggestions for ways to cope with anxiety:

Generalized Anxiety Disorder Treatment | Psych Central

10 Things People With Anxiety Need to Do Every Day

9 Ways to Reduce Anxiety Right Here, Right Now

15 Small Steps You Can Take Today to Improve Anxiety Symptoms

Top 10 Lesser-Known Self-Help Strategies for Anxiety

https://blogs.psychcentral.com/menta...xiety-attacks/

Best wishes...