Depression, anxiety, paranoia, memory loss, confusion, trouble concentrating, vision trouble, seeing and hearing things.?

Very serious . You need to be evaluated by your doctor as soon as possible. The symptoms you describe are very serious and need to be treated. It is extremely important that your condition be accurately diagnosed so that the appropriate treatment can be provided. The differential diagnosis is broad and ranges from a medical cause to Schizophrenia versus Substance-Induced Psychosis. .