I apologize for taking so long to reply; it's been a crazy couple of weeks.
@JAG, I love what you said. It's essentially what my therapist told me to do. She said it's reasonable to feel scared in a parking lot at night in a high-crime part of LA as a lone female, so staying in bright light and looking out under the cars is perfectly reasonable. She believes my hyper vigilance will give way to plain "vigilance" as I acknowledge that I couldn't have prevented my sexual assaults and release self-blame.
I bet that probably applies to a lot of you. I know that my boyfriend and I both took responsibility for our abuse as children by changing our behavior so as not to "provoke" our parents. We thought our sisters were insane for acting defiant, as they received the brunt of the abuse when they did so, and we were less harmed by being pleasing. That victim-blaming attitude was a survival mechanism for us, but it doesn't acknowledge that even if we'd had perfect information and so did our sisters, our parents attacked us and there was nothing we could do about it. Recognizing you didn't cause or allow the bad things that happened to you might be helpful in reducing your body's tendency to constantly overreact with self-protection and seek to prevent the event's recurrence. Instead of focusing on what we could have or should have done to avoid the trauma, we can focus on what the person responsible for the trauma shouldn't have done and recognize our innocence.
@Richie, that's a really good question. For me, it's more of a general threat, but is often directly associated with my personal trauma. Hyper vigilance is simply "increased awareness of their surrounding environment, sometimes even frequently scanning their settings to identify potential sources of threat" (VeryWell). I wasn't attacked with a weapon, yet I watch what people pull out of their bags in a crowded subway station. When I'm walking past men, I watch their arms to make sure they aren't going to reach out and invade my personal space. When a male tries to convince a girl to come out that night repeatedly when she says she doesn't want to, I see him as someone who won't respect a 'no' and put him in the potential threat category. When I'm in a new part of town, I keep an eye on everyone around me and keep a keychain I have that can do some damage at the ready.
While being on guard is part of security protocols in the armed services, your protocols don't apply as a citizen. You're not (as) in danger, so your alarm system should be turned off most of the time. The question is, is your habitual scanning accompanied by feelings of fear, desire to carry a weapon, the sensation you're always under threat? If it is, then that's hyper vigilance, not simply a routine you got into. When you come home, you stop putting on your uniform every day. Unless you thought the scanning were necessary, you would probably stop that as well because it consumes a great deal of energy.
@Freedomfighter, it's been a long day and I don't understand what you meant. Could you try articulating it a different way for me, perhaps?