In the Bible we find parents bringing children to Jesus. He held them and prayed for them and told us to welcome them. But he did not baptize them, and he did not tell anyone to baptize them. So it seems more Biblical to wait until after a personal decision to trust Christ as their Savior has been made by the child. If baptism is a public profession of salvation (as the Bible teaches), only people who have intentionally received salvation should experience baptism.
If you have not experienced adult baptism even though you have experienced baptism as an infant, the full meaning and significance of baptism has yet to take place in your life. We strongly encourage you to be baptized as an adult believer in Christ.