Don't worry I don't think you're crazy. And believe me I've been here awhile now and I have to say there have been FAR more crazy claims than this.
It could possibly be a thought form you created subconsciously, or unintentionally and its trying to sort of say "what do you want me to do now?". I would make sure to record this experience and any additional occurances. Maybe try to make contact with this body through guided meditation and pathworking. It doesn't have to be a thought form either. Some believe that the substance of the soul is much like that of the body and is only temporary in existance. Eventually the essence of one's being ascends the soul, as it did with the body. In some cases this husk of the soul can retain a fraction of its former identity and act like a thought form that was just the product of death. Or it could be just a disembodied spirit unware that it has passed on and its trying to reconnect to life. Maybe it is aware of itself and is trying to possess you. That said I deffinately think you should take safety measures. Lastly it might be one of the many hosts of entities that dwell on alternate levels of reality just trying to contact you the only way it knows how.
Probably nothing to be afraid of, but deffinately use caution, imho.
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