In this question, you will learn:
Trust Allah that as you sincerely repented, He has forgiven you.
So, forgive yourself as well. It is only Satan who whispers you such thoughts that Allah is not going to forgive you.
Avoid anything that might lead you to commit this haram act again. Avoid any temptation.
Consider the positive changes that this sin has brought in your life.
Sit down and allow yourself for a short time to feel those negative emotions. Then inshallah you will be able to let them go and focus on your future.