Do you have prevenient grace ?

Yes or No, Are you in any way drawn to know the truth about God, Jesus, the Bible ? 
Are you moving toward God or the church or Jesus ? 
If yes you most certainly have prevenient grace and should be grateful !

Do you have justifying grace ?

This is harder to understand.
God provides a lot of spiritual blessings in prevenient grace to draw people to Jesus and enable people to be spiritual human beings, and so determining the transformation from prevenient grace to justifying grace may be difficult. Pray to God for help,
 and know that God wants you to know.
  Some of the inner transformations are as follows:
1. trusting Jesus Christ for salvation, because of His grace for you, this may happen precipituously or gradually.
2.Faith in His grace may be the only change you see in yourself.