Did I experience demonic possesion

Many witches agree with the Bible on this point: Evil spirits do exist. In one essay a promoter of witchcraft warns: "The Shadows are out there: They exist, in the invisible world that parallels our own, living creatures. . . . The terms 'Imp', 'Evil Spirit' and 'Demon' are fairly accurate. They are very strong. . . . The most intelligent variety . . . are capable (if someone is helpful enough to open a doorway for them) of entering our world. . . . They can enter your body . . . , even asserting a degree of control over you. Yes, this is exactly like the old stories of Demon possession."

In Bible times, demon possession afflicted people in various ways. Some of those affected were unable to speak, some were blind, some acted insane, and some possessed superhuman strength. (Matthew 9:32; 12:22; 17:15, 18; Mark 5:2-5; Luke 8:29; 9:42; 11:14; Acts 19:16) At times the agony was compounded when many demons gained possession of a person simultaneously. (Luke 8:2, 30)

Demon possession involves controlling your body especially your brain. Usually, the person doesn´t remember anything that happened to her/him while being possessed. That´s why your case seems to be demonic harassment not demonic possession.

These are absolutely the signs of textbook demonic oppression, as outlined by the father and mother of modern paranormal research, Ed and Lorraine Warren. I like their research but they put too much emphasis on the catholic church, any follower of the Way Christ Jesus can get rid of a demon, and you can become that yourself if you aren't already. The Warrens list three major steps, infestation, oppression, and possession. It sounds like you are experiencing infestation or late infestation phenomena, I'd suggest their book as they outline these specific stages and their symptoms. I could go into great detail spiritually about the steps that should be taken, but given your stipulation I do not want to offend you. But I do implore you NOT to listen to anyone who would claim this is a human ghost.