I'm going to tell you to see a therapist or take a self-defense class. Your choice, because in today's world it is no longer rational to think you should "feel safe everywhere."

By the way, unattractive people get attacked, too. It's impossible to get inside an attacker's head because each attacker has his or her own warped reasons for harming others. Now that I am older I get sized up by people who might be thinking of snatching my purse. I carry a cane and have no hesitation in carrying it like a stick I'd gladly whack someone with--this has caused more than one suspicious looking guy to make a wide berth around me. And that is okay with me.

Don't be afraid to be obnoxious in public. Crooks and perverts count on their victims to be weak, polite, compliant, or too afraid to shout, fight back, run away, or just simply not let them get too close in the first place. Stop replying to men approaching you in public and learn to say "Beat it or I'll call a cop/security/whatever fits." Decent men don't harass women.

You might want to invest in a pair of glasses that have tinted lenses. Not so shaded as to be dangerous to wear in dim places, but so that there is a barrier between you and all these men who are looking at you all the time. Presenting yourself as busy, assertive, knowing where you are going, unafraid and unapproachable is a good idea too. Not fumbling for your keys, distractedly talking on the phone, carrying your bag hanging open, or looking down at the ground.

Hospitals are public places and definitely are not any safer than restaurants or grocery stores. Hospitals draw just as many crooks as other public places. I think you're best off working day shift in a place that takes security seriously, and if you are asked to do things that you think are unsafe on the job (such as working late) don't be afraid to ask for a safe compromise (security walks you to your car, for example).

I hope this helps