Here's what I think: God has a plan, a mighty big plan He is working out all the time. Nothing and no one can stop that plan. Within that plan there is a lot of creative leeway for all the people to live out their lives in such a way that it is part of God's plan while giving them free will. God does lead us. He leads us in many ways, but we have the choice not to go where He leads us. What does He do then?
Does He panic? Is everything ruined because of our disobedience?
No. He's like the potter. "But the vessel that he was making of clay was spoiled in the hand of the potter; so he remade into another vessel, as it pleased the potter to make." Jeremiah 18:4
An experienced potter doesn't curse the clay when it collapses on the wheel and doesn't do what He envisioned it to do. He forms it back into a lump and makes it into something else with delight of what it will become.
God doesn't curse us when we don't follow where He leads. He creatively finds another way to bring about His purpose into our lives. God is Creativity. We can't stump him no matter what we do or don't do. He never gives up hope. He never gets discouraged. He's always believing, always hoping, always enduring (this sounds like 1 Corinthians 13!).
You will never mess up so bad that you mess up God's purpose. Don't worry. Don't fret. He's got it covered. He's got your back. He's on your side urging you on to live courageously and believe Him always.