Garpu, it may seem daunting to start late, but let's do the math.
Today is Nov 4. If you start today, you've only missed 3 days. The daily word count goal is (on average) 1667 words. So you've missed that times three, or 5001 words. That seems like a lot, but...
If you spread out your missed words over the remaining 27 days in November (counting today, the 4th of Nov), that's only an additional 185.22222... words per day. Let's round up to 186.
So, to make the 50,000 word goal for November, all you have to do is 1,853 words each day, on average.
On the weekends, you can likely exceed that by several hundred, and it's not uncommon for people to do 2,000 words on average, every day, for a total of 60,000 words.
Go easy on yourself, ignore your inner editor. Make course corrections mid-sentence if you need to. Leave yourself notes in the text (those words can count too) on what you were intending.
You can do this.
If you want to. I'm not the boss of you.
P.S. This post was 187 words long.