Fear can be overwhelming and totally encompassing. Does the regime you take help at all?
Bachs flower remedies can help, I used the mouth spray B4 anxiety levels rose, never requiring more than 3 sprays. I was also on a betablocka and anti-depressants. I also have a go-to emergency anti-anxiety med .. There are pastilles too.
Pilates; relaxation therapy; sitting quietly away from others ........ what ever helps you to relax if you can manage 10-20 mins daily. Topping up VitD levels is a must for most of us . We have threads on hobbies, pets, gardening etc., we even talk about menopause ;-).