So you've been diagnosed with schizophrenia or you think you might be schizophrenic?

It sounds like your having negative symptoms, and some minor positive ones. Disorganized speech is definitely something that is often a part of schizophrenia. The rest I'm not quite sure. Honestly, talk to your doctor about it... I don't think this would be a strong enough case for a diagnosis, honestly, but it could be early onset for all I know.

"He said that I could be depressed but that’s only my age."

Can you explain a bit more what he meant by that? Affective disorders basically rule out schizophrenia because the symptoms are contradictory of each other. If you do have depression then it's highly unlikely you also have schizophrenia unless you were diagnosed incorrectly. Dysphoria is different and can be linked with schizophrenia.

If you do have depression there are multiple possible explanation for schizophrenic-like symptoms. Schizoaffective disorder, depression with psychotic features, etc.

Have you already mentioned these worries with your doctor? If you don't feel confident with your doctor's services or you aren't comfortable with him then don't be afraid to look elsewhere for help or a second opinion if you think it's warranted.