Hello thanks for asking from HCM I can understand your concern. The persistent tiredness, sleeplessness, irritability, feeling different than normal etc symptoms could occur with mood disorder like Depression. Such symptoms are also seen in generalised anxiety but need evaluation. The episode that occurred during gathering was probably a panic attack or severe anxiety. Anxiety in social situations like presentation or group discussions etc occurs due to social phobia. Try to remain relaxed with proper treatment such symptoms can be treated easily. Medicines like SSRIs if taken regularly help to reduce the anxiety symptoms. Fluoxetine, Paroxetine, Sertraline etc are used commonly. For anxiety provoking situations beta blockers like Propraolol can be used. The drug help to reduce autonomic symptoms of anxiety. Visit a psychiatrist for help. Thanks, Take care