Hello and welcome, it was interesting reading your post for a few reasons:
DMT - Very interesting trip report, I've also had limited experience with DMT, just a handful of times as I have only had access to the spice recently, but I'm ramping up the dosage tonight so hopefully will have an experience of interest to report back on
The sense of deja vu is very strange indeed with pschedlics, I had an intense breakthrough on salvia on although my memory of it is limited many times it felt like I was back somewhere I had been many times before.
Sleep Paralysis - I used to get this as a teenager and its very rare to come across someone who also has experienced it. For me it started off waking up with a strong weight pushing down on my chest, there was an incredible high pitched ringing noise and around me were very tall aliens/entities looking down on me in a surgical procedure type environment. The fear was unlike anything I had ever experienced and it was totally impossible to utter a word never mind shout and of course I was totally paralysed and couldnt move a muscle. This lasted a full 10 minutes or so and happened around 10 times, its easy to understand how these experiences are mistaken for alien abductions. My understanding is that the body is asleep, and the mind is still dreaming (hence the hallucinations) but obviously you're totally conscious.
Consciousness - agree totally with this, I'm convinced we are all one consciousness and its the whole one consciousness experiencing itself thing. And I believe consciousness exists in many forms and varying levels of self-awareness, from bacteria, to plants, to animals, to humans, and then I suspect on a greater level we have our planet, and then galaxies, to the universe, to the afterlife. I believe everything is a part of another thing, each one unaware of the level above. For example the billions of bacteria on our bodies are totally unaware of its host and it being far superior in intelligence. I suspect the same is true with us and our planet and we are effectively the equivalent of bacteria on our planet which of course is the whole Gaia hypothesis, and this cycle could continue onwards indefinitely. Likewise everything forms part of another structure in physical terms (planet orbits sun, sun orbits centre of galaxy and so on) i think it is the same in consciousness terms.
Mayans - I'm a strong believer in their theories and ideas. My understanding is that the date you mention 21/12/12 marks the ending of the final baktun. The press jumped all over this with the usual predictions of doom and gloom, but their teaching were quite the opposite as they believed this marked a new golden era in human consciousness and development. I think the whole spiritual movement is definitely gaining momentum and this marks the first signs. On a more quantifiable level we have witnessed a period of discovery and progression unlike any other in the history of life on this planet in the last couple of centuries, lets not forget only a few hundred years ago we didn't have electricity and the Wright brothers were trying to fly. Now we are about to populate Mars and predictions are that the discovery of Graphene will mark a new age of discovery with an array of life changing inventions to follow. As a race we're still incredibly young and naive and many theories point to the fact that our 'awakening' has just started.
Thanks for the intro and I look forward to more trip reports