Unemployment appeals urgent advice?

I left my job because I asked my employer if they can gaurentee my safety while I worked alone at night and the answer was no. Why I asked that question was because the night before I was working, I went to the bathroom right outside the office where its located. I was on the phone with a friend because I was always weary about going out of the office to the bathroom, anyway, I heard noice outside the bathroom told my friend to shut up so I can hear but remain on the phone. I went out of the bathroom and was startled, there was a man standing 4 feet in front of me with his hands in his pocket, I freaked and quickly hit the gray box to get into the office. Just so you know, this is suppose to be a secure building, there is 4 floors and my key only lets me on the floor I belong, there is a special magnetic key for the elevator and floor, you can get on another floor unless your key lets you. This was no man working there, I knew all the cleaning crew and they were always gone by 8:00-8:30 PM. I called my supervisor and he never answered, called the second supervisor he said he didn't know who it could be to call the building supervisor, he also said he didn't know who it could be and he shouldn't be there to call the police. I called the police and they came with about 4 cop cars cause I was the only employee on my floor. They searched the floor and grounds, they couldn't find no one but did say they smelled a person's smell in the men's bathroom next to the one I was in. Tell me, is that enough reason to leave my job because they couldn't gaurentee my safety? Please help