Thanks Sophie, that's some sage advice. Keep on keeping on, and best of luck! :-)
I've composed for commercials and short films as well as a few game apps. I just watched your doco trailer, and I feel I can help. Here are some demos in a style similar to what you've used in your trailer (https://soundcloud.com/alexgoldsteinmusic/sets/drama) If you like them, and if you haven't filled the spot yet, feel free to contact me and we can talk about all that other stuff later. Otherwise, best of luck with your film.