>>68428 (OP)I randomly hear family members call to me. only to find out that they either didn't, or weren't in the house.
After a while, I chalked it up to sleep deprivation though
But, I've noticed that I've had it happen after a good eight hours.
I've only ever seen a shadow creature once, though. It started slowly materializing in the corner of my eye, but when I looked at it, it had molded into a faceless version of my older brother. It vanished into a poof of black smoke a second or so after gazing upon it.
I wouldn't look into it, it might be sleep dep.