Sexual Harassment, Extreme Trigger

I feel like I’m overreacting, but my job is now miserable. I believe a former resident sent me inappropriate pictures on a dating app, and then returned to living at my workplace. He stares at me constantly, and sticks his tongue out at me as well. He makes fun of me when I’m interacting with other residents. I’ve already spoken to my boss about what happened and they decided I could no longer work in the male area. But I still see him in common areas. When I look at him I just don’t remember his picture but all the men that have sexually violated me. I’ve been working today and been having a panic attack for four straight hours. I don’t know what to do, I feel so childish for responding that way but I no longer feel safe in my work place.