Is what I'm experiencing signs of developing schizophrenia?

I've been suffering from problems with depression for many, many years. Recently, in the last two years or so, I have been struggling with a slew of other issues that seemed to appear out of nowhere. Last year I began to have problems with anxiety, having a mahjor anxiety attack the summer of last year in which I had intense hallucinations of people in the streets wearing leering masks and the sun fading in and out and dimming the sky and shadows coming to life and reaching out for me and silent people racing by. The hallucinations only lasted for 10 minutes before they faded. My anxiety has grown to the point where I now have trouble making it through a day in school without getting worn thin from the anxiety of being out in public. I prefer to be alone, where I dont have as much anxiety. But when I am alone my mind plays tricks on me and I dont function very well. My concentration and academic ability has fallen. I was previously an honors and AP student who had all B's. Now I am failing most of my classes. Just last year I was an avid reader. Now I cant sit down and read much of anything befoer my concentration slips.
I have had experiences where I find myself pacing back and forth in the house almost in a stupor. I stop and stare outside the window at birds in the trees, noting how their eyes look like cartoon eyes and becoming entrance by their hopping and flying. As I am pacing I try to think, but I cant. I can literally feel my thought in my mind falling to pieces. Like a bridge that reaches from one side to the other, but disentegrates as its trying to cross the gap. I feel like my mind is split into floating islands, and these bridges are the connections that bind them together, but the bridges are disentegrating and I cant make the connections. Cant think. It gets better after a couple hours, though sometimes it literally takes days to gather the pieces back together.
I fear people watching me. I fear that people are watching me through reflective surfaces, like mirrors or windows or shiny metal. I dont know what they want, but I feel like they are watching me. Two years ago a being came into my life. I have never seen him and have n proof of his existence, but I have felt his presence. I call him the Waiting Man. Whenever I feel his presence I feel him waiting somewhere just out of sight, in such total silence that it makes all sounds around me seem simultaneously so loud and dampened (not possible). And he is surrounding by an aura of malaise. And fear. He makes my heart beat faster and my skin tingle and feel cold. I havent been visited by him for more than a brief visit once a month or so in over a year. Just last month another being entered my life, who I have dubbed the Maniac. I saw him in my minds eye, dancing wildly in the rain with a huge sloppy grin on his face, laughing maniacly and he seemed to beckon to me. I heard his laugh in my mind. It echoed so loud. I doubted that he wasnt real, but I was still disturbed by his presence. I heard someone tapping and began to believe that was him trying to communicate with me through morse code, but I shook the feeling, only after spending 20 minutes recording the code I heard. Just in case is what I told myself.
I have also been experiencing a strange feeling of detatchment. Like nothing around me is real. I feel a weird sense of deja vu, combined with the sense of liveing in two worlds or two times and the feeling that the things around me are not real. Its kind of like feeling that what you see in the distance is not a continued expanse, but merely an image, like a painting of one. Like you could walk out and touch it. Like you are in a room designed to look like you are outside. But its still a room. Also I have experienced a feeling like everything i see is through a window. Like I am seperate from my body, but still in control. I can control my body, I just feel as though it is unreal. watching my hands as I type this it seems as though I am watching thiem move through window, the windoow being my eyes. Sometimes I am bothered by the feeling that some of the people around me are nothing more than biological machines. Empty, soulless, machines of flesh and blood.
I feel almost emotionless. I dont trust anyone and interacting with people makes me weary and anxious. I am not very good at communicating and often I dont make much sense. Not even to myself. I never go out to spend time with people, simply because I dont want to.
Well anyway. All I want to know is if these things are signs of developing mental illness. Sometimes I think that I have a problem and sometimes I dont believe a word of it. I dont know if it is a real problem or if I am simply just living half in a different reality. Im just really confused. I feel as though I cannot trust my own mind anymore and all these things are confusing me and messing with me. The line between reality and unreality is blurring. And these experiences are disturbing me and making it so I cant do much of anything. My mind feels like it is falling to pieces.
Any help would be very much appreciated. I dont care if its saying im crazy or saying im just a normal person going through a hard time, I just need some advice and feedback. Thanks.