Hi Hop,
I was in the same situation as you this September and I have just submitted at the end of November.
My data collection finished later than expected and I started writing and polishing my draft like I was crazy.
It was a terribly stressful time but, after all the freking out, not sleeping etc., my supervisor sent back my draft untouched and suggested to do a bit of proofreading and then submit.
It seems impossible to finish because, at least in my case, I was battling both the writing and the existential dread of finishing something which has been for quite some time my main purpose.