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IMPORTANT
If you are extremely worried about ghosts or fear for your safety, speak with someone in your local community, in person, right now.
Ideally, that will be someone with a formal education in spiritual matters. That is, a full-time minister, priest, or other trusted member of the religious/spiritual community.
Do not trust anyone claiming to be helpful or trustworthy, online. Anyone can look like a trusted professional in text or chat.
See someone in real life, in your community, with a long-time history (and continued respect) of spiritual/religious service to all.