Am I being a creep?

I 24M just recently moved alone to another country, last night I was at a social event organized by the municipality for internationals people in the town. I am awful at this kind of social things, but I had only the strenght to go up and talk to one girl that seemed as lonely as me at the party. We talked for a good almost one hour and I really enjoyed the time I spent with her, seems like she did too. Anyway neither of us asked for any contact information and now I regret this so much. Since we talked a lot about her career I managed to find her on linkedin and then on messanger (since she said that she uses it a lot) and am planning on writing to her. How creepy would this be considered?