It is now wise or even permissible to make du`aa’ against yourself. The Prophet (peace be upon him) is reported as saying, “Do not invoke curses on yourself or on your children or on your possessions lest you should happen to do it at a moment when the supplications are accepted, and your prayer might be granted.” (Muslim)

You must ask Allah to guide you to His straight path and seek repentance upon  committing any sine. May Allah shower all His tranquility upon your heart and purify your soul.

My advice to you is to repeat this du`aa’, “O Allah make faith dearer to me and make it pleasing in my hearts and make disbelief, defiance and disobedience hateful to me and make me of the rightly guided.”

This is based on Allah’s saying, “And know that among you is the Messenger of Allah. If he were to obey you in much of the matter, you would be in difficulty, but Allah has endeared to you the faith and has made it pleasing in your hearts and has made hateful to you disbelief, defiance and disobedience. Those are the [rightly] guided.” (Al-Hujurat 49:7)