Hello and thank you for your question about whether you have either/both social anxiety disorder or OCD/schizophrenia. Before I answer your question, I would like to say that while I can provide you with essential information, to be properly diagnosed, you will need to see a psychologist or a psychiatrist.
While some psychiatrists will be more likely to prescribe medication, psychologists tend to prefer non-pharmacological treatments such as cognitive behavior therapy (see below).
That being said, there is a great deal that you can learn and do without visiting a doctor.
If you are diagnosed with social anxiety disorder, your doctor may prescribe either therapy only such as cognitive behavioral therapy, or drugs, or a combination.
Example drugs used are selective serotonin reuptake inhibitors (SSRIs) such as Paroxetine (Paxil) or Sertraline (Zoloft). However, drugs are for very persistent social anxiety.
I prepared a number of links and videos that will help you understand this disorder more.
1. This is what psychiatrists and psychologists look at to decide whether you fit into their category for diagnosis: DSM-5 Definition of Social Anxiety Disorder
2. Mayo Clinic on social anxiety disorder basics and treatment
1. Professional definition of social anxiety disorder and treatments
2. Types of social anxiety
By your own definition - you are not a very timid person. Therefore it may be possible that you do not have a severe form of social anxiety. It would be a good thing for you to consider trying cognitive behavioral therapy, which can be offered by psychologists (online, or in person). Another way to tackle this would be to search for video links on youtube that deal with the subject and see which works for you best. If none do, then you will need to see a professional.
Next, let's consider OCD/schizophrenia. While OCD and schizophrenia are two distinct disorders, recent research has described them as being related. In addition, there seems to be some evidence that it runs in families.
1. Obsessive Compulsive Disorder Runs in Families
2. OCD Patients & Their Kids at Greater Risk of Schizophrenia By Traci Pedersen
~ 1 min read
Again, to properly diagnose this, you will need to visit a professional. However, I would like to share with you a video series that I think offers excellent advice and techniques on dealing with OCD.
Cognitive Behavioral Therapy for OCD (set of 15 videos)
Thank you for your question.