Ashamed of my testimony

Growing up in a christian home, I am ashamed to say that I don't have my life together. And that I was addicted to pornography because I felt like I would be judged for that sin more than others. Now that I'm saved and recovered personally, I'm still ashamed of my past and dont want to share my testimony even though I know that there might be someone who needs to hear it. Help? What should I do if I am still ashamed of my testimony???