You can be absolutely confident that what was written in the Bible about Jesus is accurate, and its accuracy has been confirmed by scholars (both Christian and non-Christian) repeatedly over the centuries.
After all, who had a stronger desire to preserve and pass along accurately the message of Jesus than the first Christians? They believed He alone was the Son of God, sent from heaven to save us from our sins. They also believed nothing was more important than obeying His command to "go and make disciples of all nations ... teaching them to obey everything I have commanded you" (Matthew 28:19-20). What possible motive could they have had to change Jesus' message or suppress the facts about His life? The only logical answer is: none.
Instead, they diligently wrote down the record of Jesus' life and teachings (under the guidance of the Holy Spirit). Luke, for example, began his Gospel by assuring his readers that he had taken pains to be sure it was accurate: "I myself have carefully investigated everything from the beginning" (Luke 1:3).
Don't let anything shake your confidence in what God has given us in His Word, the Bible. Most of all, don't let anything shake your confidence in Jesus Christ, who alone came down from heaven to save us from our sins.