Baptism is a believer’s first act of obedience. Typically baptism is a one-time event, not to be repeated. Even if one is baptized, falls away from Jesus, and then rededicates, they would not be re-baptized back into the faith. They have already been obedient to Christ and their original baptism remains valid.
Under certain circumstances, however, one’s original “baptism” may not have followed the biblical example. In this scenario, a re-baptism may be appropriate. Here are specific instances where a re-baptism would be called for: 1) Being baptized into a non-Christian church. 2) Being baptized without first having sincerely accepted Jesus Christ as Lord and Savior. 3) Being baptized as an infant, therefore lacking the personal faith necessary. 4) Being baptized without immersion (ie being sprinkled). In these scenarios, being re-baptized would be appropriate since the individual had not previously submitted to the proper scriptural example.
If you have already been baptized under proper scriptural circumstances, being re-baptized is not the next step. You have already been obedient to Jesus in this area. Your next step is a full rededication of your life to Christ. Consider joining the Starting Point group, ONE&ALL’s ministry geared primarily towards rededications.