There will be a Time when there are no tears, sorrow or regret.
Now, we are in a dimension in which we must operate by faith. When you blow it, you must remember God is sovereign and He is able to redeem anything.
He has created us and placed us in a fallen world so that we would have choice. All you can do is all you can do.
What does God's Word say about success or failure?
He says you must take up The Cross and follow Him.
The One who holds the stars in place is able to make anything out of anything. He is looking for a heart of submission.
Look up and move on!