Last night right when i was in the middle of consciousness and unconsciousness i heard a loud knocking. The thing is though it sounded like i imagined it. Sounded like it was right next to me, like in my ears. I woke up abruptly obviously, i stayed awake for maybe 15 minutes being paranoid then i went back to sleep with no trouble. I've been having this problem for maybe a month and a half where i would imagine noises, random songs, words or things relevant to what i am thinking. This only happens when my mind is at ease and i'm about to fall asleep. They just sound so real, feel like i'm, becoming a schizo* or some shit.