Just saying you believing in Christ doesn't make you saved. If you believe the doctrine of the Catholic church, you are trusting your works to get you into heaven, and the only way we can go to heaven is by asking Christ for the free gift of salvation. It isn't by our works, it's by the grace of God, through Jesus Christ our Lord, and him dieing on the cross, going to hell for 3 days and 3 nights, and coming back again and ascending to heaven to sprinkle his shed blood on the mercy seat, on the tabernacle in heaven. It's not because you were baptized, because we do good works, or go to church. You can be saved and never darken the door of a church, and never get baptized.