ANY baptism that does not conform to the standard of the example set by Jesus Christ or his early apostles, or that is not based on the knowledge of the truth of the Scriptures is of no effect.
Take note that:
(1) if you were baptized in the belief that “baptism is a sacrament that cleanses us from original sin” and that it “also forgives actual sins, with all punishment due to them…” your baptism was based on a wrong belief. If cleansing from sin were the purpose of baptism, Jesus Christ who had not the slightest touch of sin would not have been baptized. St. Peter wrote of him (Jesus) as one “who did no sin, neither was guile found in his mouth”.—1 Pet. 2: 21, 22.
Baptism is a symbol of one’s conscientious agreement to sever God Almighty all the days of one’s life with the hope of resurrection in Christ Jesus. It is not for the cleansing of the filth of the flesh or sin. As it is written: “The like figure whereunto even baptism doth also now save us (not the putting away of the faith of the flesh, but the answer of a good conscience toward God,) by the resurrection of Jesus Christ.” –1 Pet. 3: 21.
In 1 John 1: 7, it is clearly stated that it is the blood of Jesus Christ that cleanses us from sins. Christ himself said: “For this is my blood of the new testament, which is shed for the remission of sins.” (Matt. 26: 27, 28; see also Heb. 9: 22; Rev. 1: 5.)
(2) If you were baptized by pouring or sprinkling of water, your baptism is certainly null and void. Baptism is a word of Greek derivation meaning immersion or dipping in water—not pouring or sprinkling. All the examples of baptism in the Holy Bible without exception were IMMERSION. Jesus Christ, the Founder of Christianity, was baptized in Jordan River. Both he and John the Baptist went into the water. (Matt. 3: 16-17). The eunuch of Ethiopia was also IMMERSED when he and the apostle Philip who baptized him went into the water.—Acts 8: 36-39.
And because immersion is absolutely necessary, being the only approved method, John the Baptist administered baptism in places where there was enough water. He did baptize people in Aenon “because there was much water there”.—John 3: 23.
For your baptism to be of any spiritual significance you must, apart from the basis of your belief in the truth, be buried with Christ in baptism. Said St. Paul:”…Therefore we are buried with him by baptism into death: that like as Christ was raised up from the dead by the glory of the Father, even so we also should walk in newness of life.”—Rom. 6: 3, 4; see also Col. 2: 12. You cannot be buried by pouring or sprinkling of water.
(3) If you were baptized as an infant your baptism is invalid because you knew nothing and could not have repented or believed in Jesus Christ. There is not a single instance in the Bible of an infant that was baptized. Even Jesus Christ, though perfect, attained the age of about 30 years before he was baptized.
Jesus Christ said, “He that BELIEVETH and is baptized shall be saved…” (Mark 16: 16) When the eunuch of Ethiopia asked for baptism, Philip told him: “If thou believest with all thine heart, thou mayest.” And because he believed and confessed Jesus Christ he was baptized.—Read Acts 8: 37. Infants cannot do this in their tender age.