Can be totally my imagination but I have this uneasy feeling that I wanted to share here. Where I take the train (S-Bahn) everyday for home back from work, there is a weird, around his 40s guy who I keep seeing. First incident happened last week, he kept following me up and down the station. I felt his eyes on me, so I changed my location at the station. He followed me. It was around 10 pm, I had a late shift. Then, although the train was empty, he sat next to me, looking at me. I stood up and changed my seat. Didn't look back, that what happened to him. Now I saw him again same location, but now in the bus stop to work, during the day this time. he wears the same clothes and looks exactly the same that day. I felt strongly uncomfortable, even scared. He kept staring at me. Again changed the location, he followed, staring at me, when I looked back at him angrily, he is not looking back. He was taking the same bus I wanted to take, but then I didn't. He took the bus, staring at me from the window. You know the feeling when someone stares at you, you feel it somehow. I feel so uneasy. I hope I am imagining. But my gut feeling says not. Don't know what to do if I see him again. Afraid now.

Update: I told a trusted friend about the situation and reactions from here. We have decided:

-changing my route -checking around if he is following me. -calling her if I see him again -not contacting to him or say anything to him -I also described him how he looks. -if he gets closer, calling the police.