Did you miss me?

This year saw things get very busy for me and my computer died quite early on in the piece. With so much going on it was never really a top priority getting it back in order but I finally have one again!
And I return bearing questions! =P
Almost a year ago now I ran into this group (http://www.gnosticsociety.org.au/). They were running free seminars with the promise of teaching you how to Astral Project. After flicking through the website, it seemed like it certainly couldn't hurt so I went along to the seminars. Even better that they were free!
Armed with what I know from my studies in the past, I attended the seminars for 6 of the 10 week course (got too busy after that). Surprisingly, some of the teachers knew quite well what they were talking about. Rather, their experiences paralled mine. Some were much more religious in their manner of teaching but still contained some juicy information for the milking.
To cut to the chase here, the method they provided for Astral Projection came via Lucid Dreaming. An old tried-and-true method. I'm a very vivid dreamer but exceedingly rarely lucid so I thought if they could teach me to wake up during a dream and project I would be able to start researching again! Pull the fleshy veil from my eyes and see!
Their lucid-dreaming awakening thing was, in a nutshell:
Throughout the day, ask yourself whether you're awake or not. Ask yourself how you got where you are, what you've just done, what you're aiming to do. Ask yourself this as often as possible.
And the other thing they suggested was to pull your finger when you're questioning yourself. If it stretches, you're dreaming. If it doesn't, you're awake. Pretty simple huh?
So I started trying to do this as frequently as I could and had a fair bit of success. I was pulling my damn finger 30-40 times a day! It all paid off a few weeks later. Read on!
One night whilst dreaming I asked myself how I got where I was. Then questioned how I was able to jump 30 foot down and land on concrete without injuring myself.. Then sitting on a couch that wasn't there 5 seconds prior. This triggered the finger-pulling reflex I'd developed, it stretched out and made me realise I WAS DREAMING!
The funny thing is.. When I came to realise that, alarm bells sounded a light started flashing. Now I mean that literally. It was like I was watching myself (I dream in 3rd person) on television and suddenly police sirens are wailing and the screen was flashing red. Woke me up quick-smart!
The next time the method worked was a few nights later. After being chased around by zombies for a while, some part of me realised that isn't incredibly likely to happen if I'm awake and I tried pulling my finger again. It didn't stretch this time but that same part of me knew I was dreaming so I kept trying. I pulled harder and it did eventually stretch. However, unlike the first time, it was accompanied by extreme pain. It felt like I was actually stretching out the bones, ligaments, tendons, muscles, nerves, etc. etc. of my poor finger. The pain, as well as the fear, woke me up and I found myself in a Gnostic seminar. I posed the question as to why it hurt so much to one of the instructors only to have him say, "How should we know? We're just your subconscious". The gathered people then proceeeded to fade away, sirens rang and I woke up properly.
I continued to practice the method for another few months but nothing more occured.
I have my own views on what happened but wish to ask someone more experienced than I:
Why did that happen?! Why, when I became aware I was lucid dreaming, did sirens go off and wake me up? Why did the finger-stretching cause such agonising pain the second time around then lead to the weird 'meeting room' thing? Why didn't it work?
I'll keep my thoughts brief because this is already long enough:
It actually felt like I was being blocked from lucid dreaming/projecting. That something (internal or external I couldn't determine) was hell-bent on keeping me in my body, making sure I wasn't becoming lucid and generally giving me an unpleasant experience with the whole thing. A part of me felt this could have been my Inner not approving and locking me in nice and tight but that conclusion could have been me jumping to conclusions based on previous experiences. The fact I also directly questioned my subconscious/Inner and got a blank answer makes me think there might have been more to it than that, as well.
This all happened quite some time ago (October/November last year) but it's bugged me ever since. Kind've scared me as well. It felt like I was doing something wrong by trying to project in that manner, or trying to project at all.
The reason I'm finally asking is because I'm trying to get back into magical practice again. It's been a long time but things have recently started prodding me back in this direction and I want to give it a red-hot go this time instead of the half-assed efforts I've delivered in the past.
Is it possible (or likely) that something was actively blocking me from projecting? Faulty hardware, glitching software? External influences? If so.. Is that something that would sort itself out over time?
My senses have turned themselves back on in the last few months and I'm starting to get a lot more input. Which brings with it a lot more head pains (as is my style). I've also found that when I'm actively and consciously (attempting to) project or working with energy I have a distinct headache afterwards. Also tends to make me very drowsy and sleepy. I know I'm not using internal energy for my pet projects so could I have blown a fuse and gone with a less-sturdy re-wiring?
This is a pretty long comeback speech so I might end it there. The story will hopefully provide a bit of background for the experiences and the fears that have arisen because of those. If anyone has any ideas or suggestions? If not, hopefully the story was half-way entertaining. Thanks for your time!