I could not recall anything that happened before I took a nap

Location: Ohio United States

I laid down for a nap after work.I don’t have any recollection of how long I napped. But when I woke up I didn’t know if it was day or night and could not recall anything that happened before I took the nap. I’ve done this several times in my lifetime. What causes this to happen? It’s very disturbing!!!!

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