I know exactly what you mean when you say a "thought just enters your head and just digs away until it won't go away....you dont want to tell anyone because hey? what if you just dreamed about it and didn't really have a "vision"? This happens to me very frequently, and more often now. This leads to holding back the truth from others because you fear of being ridiculed of a "doomsdayer" or a "false-prophet"...we are all prophets in our own way...take a look at the movies and songs on the radio all about changes, light, new vibrations, UFOs, etc. So just a dream or not...something is going on under it all, its only a matter of time until we all start having the same dream...that then becomes our reality.......