Irina-KDmitry, could you suggest one time I worked very closely on the OS, nightfall was like a "drug", kept a record of dreams and including the OS. And then there was fear the cause is still can not understand for a long time afraid to fall asleep, sitting up in the morning until tired sleep. What did I do wrong? Now again started, but until the OS no.
First, the fact that they are not, should not be afraid. In my humble opinion, intense practice lucid dreaming in an urban environment is associated with stress to the body, with large internal stress. And sooner or later it leads to depletion of its resources. This is my current opinion, I always thought so. But I've met a lot of dreamers and make generalized inferences from their observations.
Then there's harmful, to my mind the psychological setup of people in modern society to permanent success and the consequent dominance. Is necessarily leads to depression, because they are constantly going up impossible, as well as to dominate all.
Consider better awareness, and other manifestations of clarity in dreams as a gift... a gift cannot be required, but it can be earned.
AS FOR THE FEAR. Here I agree with Roman that its cause is always inside. You did everything right. Just as you release the baggage of the unconscious memory You have stumbled upon some sort of traumatic memory that will likely not remember, but which, nevertheless, left a painful residue, preventing further work. It could be an ordinary stop breathing for a minute and a half that on a really frequent, but can cause terrible visions, as the person feels suffocation. If this is Your case, you will practice controlled breathing delays under the guidance of an experienced person. However, I find it hard to recommend something without having contact with You. As for CD Andrei Patrushev, probably, it will also be useful.<