Hello thanks for asking After misunderstanding with your friend you feel depressed and then you have developed the symptoms like difficulty to talk fluently. You are not able to converse properly in your language or in english. These symptoms could be the symptoms of Social Anxiety (Phobia). Some times due to some important event individuals develop depressive symptoms and then they start losing confidence. Consult a Psychiatrist for proper treatment. As the problem is mild so most likely you will respond with counselling alone. In other cases if medicines are needed then SSRIs are used to decrease anxiety associated with social phobia and to improve confidence. Fluoxetine, Sertraline etc drugs are very useful. For symptomatic control like in situations of presentation or in group discussion medicines like Propranolol prove useful. The drug can be taken few hours before any important event. Consult a Psychiatrist for prescription. Thanks