It could be that you have Social Anxiety Disorder. This is characterised by extreme self-consciousness in social situations, and extreme fear of social situations approaching a phobic reaction (often physical). I would advise seeing your doctor A.S.A.P before things have a chance to downward spiral. He will probably refer you to a psychologist if he suspects S.A.D. It is certainly a problem that can be overcome with cognitive behavioural therapy etc.