The past cannot be different from what has actually occurred. God wants to help you make a new beginning instead, starting right where you are. Now is the only place you can start cause it is where He has you right now.
You are capable of living joyfully in this moment. All He is has asked you to deal with is the moment you are in right now.
We find it difficult to believe the future will be any different then our present when we are in the midst of things. The future is one of those secret things that only God knows. Release it to Him. Refuse to worry aobut things you have no control over anyway. You will find what He provides for you today to be sufficient for today.
Luke 1:37 For nothing is impossible with God.