Could I be schizophrenic?

Well one day when I was extremely bored I took some schizophrenic surveys, I have scored pretty high but they tell me to no talk it as a diagnosis. Sometimes in school when I am making conversations in my mind because I easily forget what I was doing but anyways I usually assume that people can hear my thoughts and they are all just playing it all out and are potting to get me! I also tend to smell and hear things others cannot, but I read that people who are insane never really know if they are insane so if I suspect it it would make me not insane, but then once I suspect I'm not insane but since of the scores it proves I am insane, which would make me insane! Anyways I also tend to have high stress levels and just lose it every now and then and yell out gibberish out of the top of my lungs or I either destroy things, even my food when the food makes me angry. I usually respond to the conversations in my mind through faces and sometimes forget about reality and find the arguments to turn out to be real. I tend to have violent thoughts of me losing it and committing genius plans to protect myself from being caught and sometimes I think about taking out the anger on myself or others usually through shoving something through the skin and tearing out organs. I feel I am very special in some way and since I believe to be schizophrenic I otherwise do not want anybody to know which means I do not want to visit a therapist. What happens if I really am and turn out to end up hurting someone or their property