relax, hjpalm. that "twang" is called exaggerated startle reflex, it is one of the really common ptsd symptoms. you have to calm yourself when you are that high-strung. not always easy, but you can learn it with breathing techniques. deep slow breaths in thrrough the nose, and blow out through the mouth. practice. anti-anxiety drugs might help til you can learn. some anti-depressants actually make it worse, so mention it to your dr.
cathy