That's awful. You have my sympathy.
So it's to be expected, then, that you've got extreme anxiety issues, and that they can be tipped over into the realm of constant alarm by adding stress.
This is an imbalanced (Limbic-)Hypothalamic-Pituitary-Adrenal Axis (HPA axis). These are parts of your brain linked together to handle danger and stress. Your HPA axis has experienced too much danger for too long and now is going haywire. Your stress system has turned into Chicken Little. Not only will you experience superfluous panic, but your body will start to go haywire, too. Poor digestion, sore joints and inflammation, dizziness, confusion, dehydration, slow wound healing, hair loss and thin nails, and much more. You need to calm your HPA axis before it runs your body into the ground. And you need to start supporting your overly-stressed system, too.
There are lots of ideas on how to calm your HPA and how to support a stressed-out body that you'll be able to find here (in the Curezone Adrenal Fatigue forum). I recommend reading all the posts in this forum since the beginning. Yeah, there are nearly 300 pages, but I'm sure you'd rather read that many pages than be one of us who's contributed substantially to writing those pages.
Good basic ways to calm an HPA: regular sleep, mindfulness meditation, quiet walks in nature, light exercise, loving touch, sharing your feelings with someone understanding. These things sound fluffy and unrelated to physical health, but if you don't respect the connection between mind and body you will learn with bold and painful evidence how real it is. Mind matters.
Good basic ways to support a stressed-out body: take a daily B vitamin complex, take vitamin C, take digestive enzymes or probiotics.
Good luck. The folks here in this AF ("Adrenal Fatigue") forum are nice and helpful. Maybe we'll see you around.