Yeah, Omar is right. Starting over is a great advice, unintuively as it may sound.
You probably think something along the lines of: “Do I have to do all that work again?”, but actually, the second (third…) time, it’ll go so much faster and the result will also be better.
Whenever I feel like I’m ‘losing control’ of the model, I just start over. I still do this, even after 14 years of using Blender daily.