1) You are not sure what it means to believe in Jesus.
Go to the following link about searching for God which describes how to go to heaven to discover if you are a Christian. Also, you can visit “A Person Becomes a Christian When . . .”
2) You are worried because you have sinned.
Some people doubt they are Christians because of some sin or sins they have committed or an ongoing sinful habit. They fear punishment from God. They cannot imagine that they are really a Christian. The Q&As titled, “Am I a Christian since I struggle with sin?” and “How long can a person sin and still be a Christian?” will explain this principle more. If you would like to know how to have more victory over sin, visit “Filled With The Spirit.” and “Holy Spirit Gives Us Victory Over Sin.”
3) You believe you can lose your salvation.
Maybe you think you can lose your salvation and so you worry. If this is your situation, then read the study “Saved Only Once” and listen to the studies “Saved Only Once or Always?” and “Rejoice – Your Salvation Is Secure!”
4) You do not see the evidence that you are a Christian.
Maybe you do not see any or very little spiritual growth in your life. If this describes you, then take the self inventory test. The inventory will reveal evidences that are true of a Christian. After a person becomes a Christian, God the Holy Spirit will begin making changes in you. How many of these changes have occurred in you? You are encouraged to read “What are the signs that a person is filled with the Holy Spirit?”