Magic Forums

One night while lying in bed, I went through multiple articles on SoM, finding the best way to go about doing astral projection. I did not read the experiences of others, but here is my own:
Nothing was very clear. Everything had a grey quality, and the only reason I knew where I was going is I know my way around the house and the front of the yard. Maybe this was because it was night, but I am not entirely sure. What I do remember, however, is light would actually flash in front of my eyes, and I'm assuming this was due to a car driving by and that I was seeing the headlights. Soon, after wandering around with no idea of what was happening, my physical body jolts after a very bright light appears, as if I were hit by this "car." Maybe I wandered into the road without knowing it? It took me ten or so minutes to really get back to my physical body, and I haven't tried astral projection since (though I may try again tonight).
Does anybody have any idea as to what happened? Is this a normal occurrence in beginners, or does this indicate something else?

Thanks,
Emily