Depression and fears.

I'm so scared and need advice, please do not judge me I already feel horrible.

I absolutely adore my husband, he is amazing, but I didn't always see that. Before we married I wasn't loyal for a long time, he had no clue I was a horrible person, as soon as we got married it hit me hard that I had hurt the one I love the most, ever since, many years have passed and we have a great relationship, I have the goal in life to show him I truly love him and that he was not stupid to choose to stay with me. Now that I will be a mom I can't help but think that if my daughter knew about all of this she would be ashamed of me and what I did to her father when I was young. How will I teach her that it was a huge mistake that I know I'm lucky to not have lost his father over, and how do I teach her that not everyone will always see how much wrong they have done? I constantly regret what I did and now that we are finally expecting I feel even worse.