I've learned that every working mom is a superwoman.
For many women going back to work a few months after having a baby is overwhelming and unmanageable. As strange as it may seem things get even more difficult for a working mom after the second and third baby arrive. By that time the romance of being a modern 'superwoman' wears off and reality sets in.
Our worldly successes cannot be guaranteed but our ability to achieve spiritual success is entirely up to us thanks to the grace of God. The best advice I know is to give is to give those worldly things your best but never your all - reserve the ultimate hope for the only one who can grant it.