Why am i having problems in my right eye?

You portray yourself as intelligent for a 15 year old so it should go without saying that you just need to go to an optometrist and have your eyes checked by a professional who knows what to look for. Large spots can be indicative of many serious eyes issues. Your eye sight is not something you should screw around with. And your symptoms would seem to indicate something more than can be fixed with a home remedy.