I also appreciate your honesty in sharing these things with us. I have gone through similar times as you described and on top of feeling spiritually "sick" in those time I have had tons of guilt to deal with as well. I keep thinking if "I" truly love GOD why don't I want to read HIS words more. I feel like a failure and so the cycle goes.
I wish I could shout from the rooftops to all defeated believers: "Don't listen to the devil's lies! You are not alone!" Failure, upsets, moral defeats are not uncommon to real believers dear sister. The reason we do not hear more teachings on failure or the commonality of defeat preached from the pulpit is because most Christians try to cover up their own failure out of shame. They want to others to think theirs is always a close walk with Jesus, that their prayer life is vibrant, and that their appetite for God's Word is ever-voracious. It's not true.
The most mature believers will never hesitate in telling you and everyone who will listen how much of a failure they are and a grief before God. In reality, their lives may be fine examples of repentance and reliance upon God's grace, but in their eyes, they are the chief of sinners.
My real life is wretched in terms of faithfulness to God. I love Him and seek to please Him, but I am powerless for even one moment of victory without His grace. I see myself as totally undeserving, abysmally weak, traitorous to His love, harsh toward my family and selfish above all. I detest myself. But God has given me so much in spite of this. He has been so very good to me; indeed, the more wretchedly undeserving I am in my own eyes, the more He showers me with kindness, love and mercy. I simply can't escape His compassion - He is too good. His goodness ever brings me back to repentance. He clearly does not do things our way. If God were a CEO and I were an employee I would have been deservedly fired from the company a long time ago. If God were a Syndicate Boss and I were a soldier, I would have been "whacked" years ago. But God does not operate like this. After years of failure and betrayal, He promotes you instead!
But the promotion comes at a cost. To get real revelation on God's character in these areas, you have to go through some dark, dark nights. You really have to taste how wretched you are. When people say, "You shouldn't see yourself as a failure. See yourself as a Royal Prince instead!" I know they have no understanding of these things. Sure, we are royal princes and priests, but it is on account of Jesus Christ's merit, not yours or mine. It is really nothing to be proud of, because we didn't earn it. God is a Great King and like traitors we deserved the chopping block, but He blesses with with castles and titles of nobility instead. Where is the boasting in this? This is why Paul could say that he dare not boast in anything except the death of Christ whereby His nobility and riches were proferred.
This world is beset with sorrow, trials, failure, and a myriad of upsets for the believing follower of Jesus. The blood of Christ is like a balm that takes the edge off of all our sojourning misery down here. The grace of God is the magnificent power of the King which keeps us from utter ruin. The pain of defeat is so great down here; it will make the bliss of eternal victory in our glorified estates all the more sweet!
Brother Paul