Sometimes the person who says something first doesn't say it the best. It takes courage to articulate a new thought that is different from others.
It also takes courage to articulate a thought when you know may stumble because of it's novelty and freshness.
Say it anyway. Go first.
To help with this, surround yourself with people who can help echo your thoughts, improve them, and will still give you the credit for it.
Having people who can say it better than you means that your ideas will have legs and go further. You're more likely to see them out in the world running around in the future.
They'll be another idea that will come along. You should go first next time too. And the time after that.