You did the right thing.

Something like that happened to me when I was in college. I was shopping in a strip mall next to campus when a man in an overcoat kept following me from store to store. He would position himself so that he would walk by and say an obscenity. I called the cops and they got him. He tried to run when he saw them pull up, and I pointed to the store he ran into.

Frankly, I wished I had run instead of calling the cops, because after they nabbed him, they said I had to agree to testify in order to arrest him, so I did. But then I did nothing but worry that he would find out who I was.

They never did contact me.