What do you think of this situation and what should I do ?

Ok so I was walking up the stairs one time and there was a Spanish guy while I was walking the stairs to go upstairs and he followed up upstairs like he was about to rape me or touch me or do anything to me and I didn’t see his face and he was following the stairs the other side too from across from me and I didn’t see his face and I felt him smiling I think. Then I ran up the stairs and he was running up the stairs from across from me on the stairs like he was abut to rape me or follow me to kill me or murder me and I didn’t see him once I ran up the stairs and I went into my apartment forcing and twitching the doorknob right to open and I was scared and became scared the whole time while running up the stairs and he was following me on the stairs across from me once I made it up my apartment but I didn’t see him and I know he didn’t make it up the same time as me once I made it to the front of my apartment and inside my apartment. I’m old now and traumatized from now. What do you think of this situation and what should I do?