I worked real hard at keeping the peace of the spirit that I recieved at my Baptism, but with 2 boys that fight constantly, it only lasted about a week, before I finally broke down and started back at my old habits. First To remind you that all sins committed before your Baptism are already forgiven by the action of the Sacrament of Baptism. Only those sins that were committed after Baptism are required to be confessed. Yes, you should account each sinful action and the number of times it was committed along with any circumstances that might help shed some light. An example would be anger.
Many people require help and lots of time to learn to control their response to anger.
It's not something that suddenly is no longer a problem for them after one confession.