Hearing Knocking

Ok a year or so ago, for a few months, just as I'm about to wake up I would hear someone say something to me. It could have been in the dream but it seemed like It was too loud and only in one ear. Another thing is that a few things "it" would say actually come true. Anyways, that stoped but now I'm hearing knocking, it literally wakes me up. Does anyone experience this and if so does it mean anything besides that I'm slowley going nuts. lol

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