Most likely we all have those times we question things. I do. Our faith will be tried. Evil is all around us, in some form or another. We are also told that the trials and hard times make us more like our Lord Jesus, strengthens our faith. Painfully, following Him leads in the same direction He took. No path is one He has not already gone ahead of us, and overcame for us. It gets hard, we have doubts and fears, cause we are growing, and more of self has to die, that is why it seems hard, we are struggling with our carnal nature. Personally I believe that Peter and Paul had fervent love for one another, but Paul did confront him. And we know that God sure loves us, but He will chastise, and allow the fiery trials. They are for our benefit, really. I know, that seems strange, though we are not supposed to think it strange, as Peter said.
I hope you find strength, and encouragement. My attempts do the opposite it seems. Anyhow, I think the same sometimes. I don't doubt God, I doubt myself. But He knows more than I do. God give you peace and strength sis, through our Lord and Saviour Jesus Christ. Trust Him.