Sheik's Confusion

Be gentle, this is my first foray into watercolors xD I was inspired by who is in my comic class and did her comic with lovely watercolors.

Anyway, I was at Anime St. Louis cosplaying as Sheik, and I just so happened to see a sign on one of the bathrooms that said "women only, please" so I had my friend take a picture of me standing outside the bathrooms looking confused. It was a really bad quality picture on a shitty camera phone, so I decided to draw it instead

This is the result. I'm thinking of adding pen to the outlines to make it stand out more... I dunno, what do you think?