Once we are saved, there is nothing that we can ever do or that can ever be done to cause us to lose our salvation. When we accept Jesus Christ as our Lord and Savior, we become children of God, and there are various “DNA” tests that we can check to make sure that He lives in us. We need to pray to God, proclaim that Jesus is Lord, ask for forgiveness of our sins, begin a relationship with Him and move forward in that.