@ntaylor0568,
In my opinion, we do sleep walk and I do believe in astral travelling as I had a strange occurrence as a kid that I can't explain however, astral travelling would explain but in just looking up how your situation can occur, your body would have to have fallen asleep but your mind still very active.
Is it possible therefore that you thought you were studying however, you took a nap. Our Minds are amazing things and can still be very active when asleep.
"Out of body experience" I believe that they call it.
Whilst some see this as scientific others would see it as spiritual so I can understand why you don't wish to disclose other situations in fear that people will call you an idiot or laugh.
Look up Astral travelling including being awake.
I also don't get why you titled this Hauntings and human forms being taken.
That suggests aliens
One must also smile.