Afraid I have schizophrenia? I'm had lots of anxiety, pervasive thoughts and paranoia recently, and am scared of possibly hallucinating. An MRI a few months ago revealed subtle "T2/FLAIR hyper intensity... in the periatrial region bilaterally"?

An MRI will not. reveal schizophrenia. Please see a mental health professional for diagnosis and treatment if needed. This can be many things, including an anxiety or panic disorder. Peace and good health.
? You must be seeing your doctor if you had a Mir? Why did you have a mri? You need full medical evaluation before you can go to be evaluated for any mental health issues. Also need to give good history such as any drug or alcohol involvement? Family history? This is where you start for an evaluation and then a diagnosis .