Has my location? I think?

Hi earlier today I received a message on my Facebook hi greetings from Brooklyn . How is it possible he has my location? The only thing that comes to mind is that he searched my profile which says I checked into a movie theater in 2015. 6 hours later I found out I had my location on from my iPhone settings. I quickly turned it off, do you guys think he has my exact location ? I’m starting to get worried tbh.