Psalm139:16

Your eyes saw my unformed substance; in your book were written, every one of them, the days that were formed for me, when as yet there were none of them. 

This is my proof text for everything I've been saying about how to have peace about the future. When you were in the womb, God had already mapped out each one of your days. They were formed for you, by the God who loves you and laid down His life for you. I take so much comfort in this. I hope you do too.