Sometimes you loose confidence in what/how you do with your baby. It makes a tiring situation even worse.
Could be that a stupid book doesn’t deliver and makes things worse. Could be that your subconscious is right and you did screw up and spoiled him. Doesn’t matter.
Try to survive through the current episode. Don’t get bogged down in what we did wrong? questions. Calm the panic in your mind and the terror in your voice enough to be able to say: this is temporary — and try to believe it, you got nothing to loose.
Saddle up for the next round, because you have to and after you get your confidence back, will want to. I promise it will work again, you’ll regain the confidence and make things better.
Until you screw up things again.