A diagnose of schizophrenia is not given lightly or without a good reason. They must have seen something in you and something terribly wrong with you to make them give that diagnosis. It’s hard to see ourselves as other people see us, to people around you, it might be totally clear that you are ill even though you can’t see it yourself. For the sake of argument, it’s possible that they might have mis-diagnosised you. But that doesn’t mean nothing is wrong with you.
You probably have some serious type of mental illness. The sooner that you start treating what ever is wrong with you, the better chances of having a better life. If you really are schizophrenic, then untreated schizophrenia can cause major problems for you now AND in the future.