I had a real-life stalker last summer

It started innocently enough; I had a customer that needed help shopping for his fiancé, at least that's what he told me at the time.  I had helped him pick out some jewelry and fragrance, on two separate occasions.  I thought he was an odd customer, and he did make me feel uncomfortable the first time I waited on him, but I never put any more thought to it than that.  There was something strange about him though I picked up intuitively, however I couldn't put my finger on what it was. Soon after, I started to see him everywhere at my job.  He would walk through my work, I'd see him in the mall, I'd see him in the parking lot, he had told me he was a college student so I had just assumed he must be studying, mall walking, etc., normal things that college students do.  I didn't realize how wrong I was.  My co-workers would see him come to my work even when I wasn't there, looking for me.  They all kind of joked that I had a stalker, but I never took him as a threat, that is until things changed.  It became clear I was being stalked when he would walk by me repeatedly, staring at me.  Or when he'd sit outside my work, staring at me.  It got so bad that I stopped greeting him, which is part of my job because at this point it was becoming harassment.  He never bought anything and made a point to walk by me and stare.  Believe it or not I still didn't report this to the police because he wasn't doing anything technically wrong, although making me feel uncomfortable and possibly loitering.  Things took a swift turn when he started parking right next to me in the parking lot and driving back and forth staring at me while I was on my lunch break.  He never talked to me, only stared.  That night when I went home, I had a nightmare about being circled by a great white shark.  That was the nightmare that I needed to make a police report, I realized this was getting serious, and I hadn't been taking it seriously, it was escalating.  He was literally the great white shark.  So, the next day when I was on my lunch break, and he showed up, I called the police.  I felt like I was going to have a panic attack because I didn't know how he was going to react.  To my surprise he admitted the whole thing to the police that he was stalking me and he got legally banned from my work the same day.  I never had PTSD before, but after this experience, I did for a bit.  Every time I saw a car that resembled his I panicked, even though it wasn't him, by this time the stalking had been going on for months.  I'm so thankful that I had that nightmare because that was the catalyst I needed to take action and prevent whatever he was planning.  The lesson I learned from this is to trust your gut and your intuition, they might save your life.  Also be aware of your surroundings and don't be embarrassed to make a police report.