I don't feel like myself is there something wrong with me

I don't feel like myself lately, i feel different like i changed in a sick negative way, my brain feels like its dying, forgetting, i barely can function on anything, i feel dark, irritated, confused, lost, sad, emotional, petty, depressed, anxious, obsessive thoughts, i talk back to voices in my head, i have weird twitching tremors in my body (kinda like tourettes) and i tested myself on a spirtual level, i put a crucifix on my chest and felt anxious in my stomach, took it off, it went away, put it on again and anxiety again, nauseous feeling. Is any of this normal????