Was this instincts or did i just get lucky?

Dude you are a pimp! Smooth with the stroking your hair. Don't be too eager, be suave, be casual. That was a sudden burst of confidence my friend, nice work. The exact same thing happened to me, and it lasted for an amazing 3 months. Again, nice work and that was instinct totally, call her up or text and ask her to a movie, then do it again. This depends on your age, though. Good Luck!!