On this journey, am I running in circles?

Hello all you writers out there that visit my blog; I have a question. Okay, so there are only two writers that visit my blog. Okay, okay, so there are only two people that visit my blog, and they both happen to be writers. I still have a question. When you are writing your first draft, do you get input before you are finished? I mean, it’s a new idea for a novel, prose, short story, and you sit down to write, do you wait until you are totally finished before letting someone read it?

Another question: If you do let others read your creation as it is progressing, when you get advice, do you stop and change/edit/clean up the parts that have been critiqued? Or do you continue forging ahead and return to those parts later?

I seem to be doing a lot of rewriting on the first 2-5 portions of my journey I’m calling “a novel” and I don’t even know if the story will work after chapter 10. . .maybe one never knows.

Thank you for any input!