that's disturbing i'm sorry you're experiencing all this! i believe what Open says about them feeding off negative energy, and whatever else they're doing, but that they cant feed off stillness and unattachment. i'm woking to get there myself and despite my field being muddled and distorted i keep noticing these lumps of shadow out of the corner of my eye that take off when i look directly. it seems i see them more when im agitated or indulging in anger. ii feel that where i live is full of those kinds of entities and they've been feeding off and triggering myself and the lady upstairs who i've been engaged in hostile energy exchanges with. makes sense as we are both full of distortions and are projecting our stuff at each other. i once had a vivid dream when i lived in an apartment building that startled me awake where i was simply sitting on the entrance to my balcony and watching a ship that had 3 llights shaped in a triangle flying away. a year or so later i noticed a lump on the back of my head that im sure was never there before. ever since everytime i feel any emotion intensely, an area on the same side but higher up tingles. any insight on this would be appreciated. i wish you peace from what you're going through. i can say that since i recently started actively engaging with sacred ground of being, i'm already noticing more clarity and insight. wishing you well🙏💙