We are similar in the sense of seeing shadow people and sometimes hearing voices. I am diagnosed as Borderline Personality Disorder & Mood Disorder NOS (which I suspect is Depression). My doc says my hallucinations could be a result of either those two illnesses, or my epilepsy which I have.

Sometimes I have micropsychotic episodes, which are psychotic episodes which last a short time, from hours to days...usually not exceeding a week.

And it definitely matters what you feel inside, EVEN if others can't tell that you are struggling. Getting help for what's going on inside as well as outside is so important to our well-being.