This symptom and these thoughts are classic "panic disorder" "agoraphobia" and you can improve this greatly in a quick period of time with the right kind of work. This was a specialty of the therapist that I received the most damage from doing "trauma" work--however, great at this kind of CBT work, and improvements can be quickly made here with good CBT and exposure/response work. I can really say not only from my experience but also many, many studies out of major universities around the world.it's not that I feel like the world is unsafe, it's the fear that I will lose control of my emotions and mind, which would lead to someone calling the police on me
Here is a great workbook to use, and if your therapist has any good CBT skills perhaps take about 4 sessions and work just on this symptom and your life will improve, and it carries over to other areas of life as well.
""Mastery of Your Anxiety and Panic" by Dr. Barlow and Dr. Craske. It can also provide "structure" for your therapy sessions. You can improve on this symptom and start having some freedom from the Panic. Yes, PTSD is the underlying source, but you don't have to do trauma work to make wonderful improvements with panic. Panic is a beast, a bully, and a liar. What ends up happening is we panic because we are afraid of panic. So we put behaviors in place that we then believe stopped the panic when in fact it just made panic stronger.
Get some good "tools" under your belt, practice those tools in a "safe" environment first for awhile, then set up a structured "heirarchy" of exposures and start slow. You'll be amazed.
And I think if you buy the book through myptsd website link to amazon the website will get an affiliate benefit. Good Luck!