I'm a lefty!! But like you, I only write and do a few other things with my left. Left handed sissors are the bane of my existance...I couldn't use those to save my life. Most sports and things I use my right (and I can't throw with either hand haha)

My mom was born a lefty, but they wouldn't let her use her left hand when she was in school, so she is now right handed. That happened to a friend of mine as well, but I think it was his parents, not the teachers, that wouldn't let him be left handed.