I slept "well", but I did see some strange and stressful dreams which I do not remember. Also my girlfriend saw nightmares. 

Completely, and not just on the finale but for the whole series. I once nearly screamed when I saw my own feet reflected in the shower door and a black jagged line that has appeared, etched into my TV screen since the show started is causing me anxiety. It has definitely put me on edge. 

Well I've been obsessing over the finale but I'm pretty sure this thread is going to give me nightmares. 0__o

I once had a series of 5 nights where I woke up in the night from nightmares, but that was between episodes 14-15 or 15-16, can't remember. Some of the dreams had thematic links to Twin Peaks, but I don't know if that's enough to say TP caused them, lol.

I just try not to put too much weight into my dreams, unlike Lynch. I stopped telling people my dreams long ago because that's boring to them. Have you EVER been interested in someone telling you your dreams..? It works with Lynch because he puts his dreams into a down-to-Earth narrative (meaning they're quirks rather than 'the answer'), but it no longer works if the narrative becomes the dream itself, which is such a cop out (and, you can deny it all you want, a St. Elsewhere ending.)

ok call me crazy and i cannot hide in me i'm going:

Dale Cooper was a famous and briliant FBI agent once, then he got into drugs, woman and bad bad habits. That's why he likes hot and damn good coffee! we saw his dream, together because of the past cases in his stardays in his dreams. Laura and Teressa were murdered, he failed at those cases so he went to dark side...and here we see his dark and good sides in a war in a surrealistic Lynch and Frost way.

ok i'm glad i wrote these down.

example: Leland Palmer confessed all and then in the red room he said: i didn't kill anybody.

I experienced some anxiety whilst watching 17-18 but slept ok. 

Having watched episode 18 in bed, with headphones, immediately before lights out, for the last couple of nights, my dreams have been......... troubling.

It's just me but I were very excited the day before the finale; the following night, well, just bored. I think I'm not a good DKL's fan, at least not the DKL he is today (the turning point was Lost Highway in my opinion, Mulholland Drive a partial exception).

I've been sleeping fine, all considered - I already have my own recurring nightmares without TP adding to them - but I've had waking mystical revelations, as per my own thread. 😛

I only couldn't sleep after episode 13  when James Hurley did his "just you and i"performance 😉

Same thing for me.

3 nights in a row with broken sleep.

Not the finale, not yet.  My finale "dreams" are all waking.  Last couple days are overshadowed by diffused sense of dread.  Sorta like MacLachlan's face hovering over the whole day.

Generally, no Peaks dreams with 2 exceptions.  Recently, a muddled multi-character/story arc collage that made no sense.  Then, 2 weeks ago, a disturbing very clear dream where I had an interview with Lynch.  He was sitting on a lawn chair outside in the sun, somewhere unfamiliar, smoking (once again), and I was asking him pain in the ass questions, and sort of levitating and floating a little around him.  He was just giving a sardonic smile, and taking drags on that cigarette.  No answers.  It was so clear.  Bothered me all next day.

I was up til about 3 AM thinking about the Red Room and Mr.C, im sure the burning Mr.C scene will never leave my brain.

It's funny... not to disparage your reaction a bit, but that scene had basically no effect on me. He got what he deserved - an anticlimactic, mundane trip to Hell or oblivion - and he wasn't really human anyway. Good riddance all around.

I'm much more chilled (really, surprisingly affected) by Cooper's predicament, because he's so very human. It hurts to have gotten that glimpse of quintessential Cooper, with all his warmth and spark... and then see him vaguely but unmistakably diminished in his "Richard" form... and then lost, completely at sea, on that highway with "Carrie" and outside the Palmer house. No fiery, supernatural effects, but so much devastation.