Today I read a short devotion by Beth Moore that touched on just that...
Few of us have experienced the dramatic conversion Paul went on to describe in Acts 22, but don't think your testimony is meaningless on that basis. Every conversion cost the same amount of Christ's blood shed on the cross. Yours is just as meaningful as the most dramatic conversion ever told. In the parable of the prodigal son, the elder brother felt insulted because the father accepted his brother after a season of wild living. He didn't understand the biggest difference between the two brothers was that the prodigal son had to live with the personal loss and suffering. If your conversion was less sensational than others, praise God for less drama! With it probably came less pain! You don't have to see a bright light from heaven to have a story to tell others. The determining factor is not how exciting your conversion was but how excited you are now about your conversion. As we share testimonies, we can help unbelievers see all that we've gained since Jesus came into our hearts, all the ways our lives have been blessed and enhanced by His presence within us. We often have no idea how much people are struggling to find reason to live.
I live by faith in the Son of God, who loved me and gave Himself for me. Galatians 2:20