That IS losing your salvation.
But, by the time we get old enough to think of death, MOST humans stop committing mortal sins. I have.
Guess again. It's the HEART that counts. And God doesn't distinguish between mortal and venial. Adam and Eve only took a bite of fruit.
God's children CHOOSE hell. We DO have free will. We choose God or Satan. You remember your catechism.
God's children get heaven. They made their choice and are NOT going to hell. If they go to hell, they're not God's children.
Verba ita sunt intelligenda ut res magis valeat quam pereat.
Magister meus Christus.
Therefore I have no fears.
God bless you and yours.