Your fear for your children and your household is not unfounded, but you let it drive you to a resolution that God does not permit. You say, "If he does what I think will happen, I will have no choice but to leave." Hear the apostle: "The woman which hath an husband is bound by the law to her husband so long as he liveth." You made a covenant before God, and no careless mistake of his, no sickness, no stubbornness on his part dissolves it. You think to escape ruin by fleeing, but you flee from the very place where God would have you stand and be made whole. It is not your husband's faults that are the greatest danger; it is your own unbelief. "Behold the goodness and severity of God: on them which fell, severity; but toward thee, goodness, if thou continue in his goodness: otherwise thou also shalt be cut off." The goodness that brought you into that family will keep you there if you will fear rather than flee.
You pray for your children to have the desires of their hearts, but whose desires? The world's applause, prosperity, a comfortable life? Better to pray that their hearts be conformed to the will of God. "Instill into them the fear of God from their first youth, and He will protect them better than any father; this will be a wall not to be broken." You regret not taking them to church more, and that regret is just, but now is the time to begin. God's mercy does not count past failures against those who turn to Him. Did not David say, "Blessed are they whose iniquities are forgiven, and whose sins are covered"? That forgiveness is for you, too. Cease lamenting what you did not do, and today speak to them of the Lord, pray with them, let them see you trusting God even when their father does not listen. Their "acting alike" is a small thing; train their souls, and their behavior will follow.
You are afraid your husband will be too sick to work. Is God not sovereign over the body? "By faith Noah, being warned of God of things not seen as yet, moved with fear, prepared an ark to the saving of his house." That holy fear drove him to action, not to despair. If sickness comes, it will be a furnace to test your faith, not a sign to abandon your post. The widow who brings up children in faith, Paul says, "shall be saved through the child-bearing, if they continue in faith and love and sanctification with sobriety." Not through her husband, not through health, not through a peaceful home. Your safety is not in a husband who never makes mistakes, but in the God who promises, "Where pain, sorrow and sighing are fled away" there is rest for His people. Seek that rest first, and these earthly anxieties will lose their sting.
You say he never listens to you, and you do not like how they act. But consider the silence enjoined with fear upon the woman: "Thy desire shall be to thy husband, and he shall rule over thee." This is not a license for him to sin, but a call for you to trust the God who ordained authority. Your words, filled with fear and frustration, will not win his heart; your gentle and quiet spirit, used of God, may. Pray for him, not against him. The "negative things" you want to vanish will not depart by your departure; they will follow you because they spring from a heart that has not yet found its full rest in Christ. The Lord who said to the woman at the well, "Thou hast well said, I have no husband: for thou hast had five husbands, and he whom thou now hast is not thy husband," sees every circumstance. He did not condemn her to leave again, but offered living water. Stay, and dig that well in your own home.
Fear punishment enough to keep you chaste to your vows, and then let the goodness of God lead you to love. Your husband's potential failings are not bigger than the God who protected the three children in the furnace. They said, "Thy gods we serve not," and God showed His power. If your furnace is a sick husband or a wayward family, serve no idol of comfort or control, and God will either deliver you or give you grace to endure. Do not say "I will have no choice but to leave." You always have the choice to trust the One who said, "I will never leave thee, nor forsake thee." Your petition for protection and safety is right; but God's walls are built not by fleeing, but by faith that obeys even when it does not see the outcome.