What is grace? A quick definition of grace is: free and unmerited favor. Look at the order of things God has set in place to bring you to where you are now. If you're currently going through a hardship, it will pass, and you will see that it was by God's grace that you managed to get through it. I know that it's not easy to look back, and just like everyone, there are some things in my life that I would rather forget too. But, even in those difficult times, I can see a silver lining and a piece of the plan God had for my future. When King David was just a shepherd, he didn't know that the difficulties in his life would lead to him becoming a great King, but he used every trial as a testimony. What are the things that led to your salvation and how is He using you now? Everything you have gone through is your testimony of God's grace and He will use it to help bring others to salvation. So, don't forget to share your testimony.
"Return to your home, and declare how much God has done for you." And he went away, proclaiming throughout the whole city how much Jesus had done for him. Luke 8:39