Ive had 1 auditory hallucination before, which was caused by drug induced psychosis. I haven't smoked weed since (like 4 months). Today as I was waking up I heard a voice again, a few times actually. It was quite clear as well. Is this a sign I might be developing schizophrenia? Could it be linked to other mental illnesses as well? I have been very tired lately even though I get my full 8 hours every night