Yeah its a good thing if you don't have PTSD, it is a horrible disorder...it would be sort of like what you are experiencing except like 100x worse with the added bit about having been in a situation where you're life was in danger or you perceived it to be in danger so your minds stuck thinking you're in danger all the time, certainly not fun to live with.

But if you have a therapist it might be good to talk to them about this issue, and maybe just get some support with it...even if its not PTSD it still seems to be bothering you quite a lot so addressing it in therapy might be helpful.