If I followed Luther I'd be worried about that.
All sins are indeed forgiven by baptism. But what of sins committed afterwards?
Incorrect. All of our sins are forgiven when we believe Jesus at His word.
13When you were dead in your transgressions and the uncircumcision of your flesh, He made you alive together with Him, having forgiven us all our transgressions,
14having canceled out the certificate of debt consisting of decrees against us, which was hostile to us; and He has taken it out of the way, having nailed it to the cross.
Colossians 2:13-14 NASB
But it appears you are an ardent follower of Luther's false preaching of salvation by "faith alone".
As a Lutheran I do not follow Luther or Paul. I follow Christ.