Hello I understand your concern. It sounds like you have social anxiety, made worse when you are in a social setting. Physical symptoms of social anxiety include nervousness, shaking, upset stomach and palpitations. You should have a physical exam and laboratory studies that may identify a physical cause. If no underlying cause is found such as thyroid disease or a cardiac or neurological condition, there are certain medications that are available called selective serotonin reuptake inhibitors (SSRIs). They help with the serotonin levels which have been found to be associated with anxiety. For the shakiness, betablockers have also been used with success. These medications must be used under physician supervision. It sounds like your symtptoms are interfering with your quality of life and there is treatment. I hope you get better