I can understand the distress you are through. Let me first tell you that being paranoid doesn't mean that one is having schizophrenia. Schizophrenia is a psychiatric disorder characterized by symptoms of Delusion, Hallucinations, and psychotic symptoms. They are not just doubts or suspicion but the conviction the person has about his or her false belief is greatest. He or she may hear voice that are vivid and like real. The problem that you happens to show are more suggestiive of anxiety than paranoia. In anxiety there are multiple thoughts and restlessness of mind happening. It may at time present as memory problem, not able to relax, sleep problem, tiredness, bodyaches, etc.
Next Steps
Kindly visit a psychiatrist for further management. For more information regarding this problem you can ask a detailed query here on practo.
Health Tips
Don't worry. It is a treatable condition.