Heaven could be defined as with God/Goodness
Hell could be defined without God/Goodness
Goodness is service to others. Do we choose an eternity of service to others, or do we prefer an eternity of selfishness.
It appears that obedience to God/Goodness leads to one kind of life; Disobedience to God/Goodness takes us in another direction.
In story form obedience to God/Goodness led to life in a garden. Disobedience led to work and thistles.
Your concept of trying to ensure your child has a heavenly afterlife may have good intentions. The concept of sacrificing yourself for another, also seems like good intentions. God judges what is in the heart. Any hint of selfishness in the abortion? Only God knows, but God can work with goodness. You might end up in an eternity of service after all.