Well I feel I can contribute to this part of the conversation.
I often have "other worldly" thoughts or "demonic" thoughts. Does that mean I am myself demonic? Or that I am going to transform into a winged demon and ditch my flesh prison to eat the delicious hearts of the courageous?
No matter how much I may want to (only because hearts are all muscle, high protein, iron, and with my daily dose of warrior spirit) that does not mean I am going to, or that it will happen.
Look your thoughts do not determine who you are or what you are. Your actions do a better job at that. (sometimes the lack of action) If you manipulate your mind to believe you are a demon and that all your thoughts must be like what you perceived a demon would think, then you will ruin yourself. You will believe you are a demon and you will either get put in the crazy house, be depressed because you are stuck being in a human body and your life did not change at all now that you are a demon or a real demon might find it fun to see where this goes. (that is not a positive thing)
Notice there were no positive results for manipulating your mind to believe you are a demon.
Whether I make sense or not just continue believing you are normal and life is more likely to be safe.