That's normal and it's what keeps you alive, your instinct for survival.I totally agree, thats what matter at the end we didnt get hurt ....
But after that i passed like one week with sleeping problems, thinking that maybe the people in the street might were involved, and putting my pepper spray under my pillow .... totally paranoid =X
Having your pepper spray handy isn't a bad idea.
You never know when it might save you.