are you better off retreating to a safe place and hopping on 911 to ensure help arrives.
I'm on the end of the 911 call for 24 hours at a time when I'm on duty. I'd say that 35-50% of the time, the 911 dispatch is incorrect as far as location or call severity. I wouldn't neccesarily place my life on the quickness or completeness of my 911 call. We have E911 via Concord dispatch and that's not even close to 75-80% most of the time.
Calling 911 *may* get someone moving in your direction, but it may turn out to be the response you were not expecting...