intense fear and hypervigilant it might be. do you have any flashbacks? i do and i have nightmares every night i have PTSD since '94 :)
Sounds like PTSD to me, but I'm no doctor. However, your doctor will know how to properly address your issues. Seek medical attention either with your primary care physician or that of a therapist that deals with PTSD.
You should definately see a doctor. And if you do get any diagnoses you should remember that it is a way to help define a treatment plan, not an identity.