Sometimes when you want to write, you fear that because it has all been said before, you can't say it again. However you can indeed say it again because perhaps people were not listening those 1 million times or even if they were, you can say it in your unique and weird way that makes people have a better understanding and appreciation of it.
Do not be afraid to express yourself. You have a voice, use it. Someone somewhere could listen to you simply because of the way you express yourself. He or she might even benefit from your self expression. So go on and express yourself. Do not let fear stop you. We are all afraid however the people who go on to do things are the ones that know that fear is just an illusion. They act despite the fear.