Hi. Thanks for your query. Noted the history and understood your concerns. Since you know that you are nervous and have a lot of anxiety particularly on going with the people, the cause is certain. I would advise you the following: Get a consultation of a Psychiatrist to get a proper clinical evaluation of your problems and get started on a proper medications for anxiety. You can also try other forms like Meditation, yoga, being with like minded people to get a proper social mixing and get accustomed with the social norms to get you the confidence which in itself is a part of the treatment., This is a form of IBS that is irritable bowel syndrome hence get treated accordingly. Also reduce the intake of the foods that contain nuts and such things that cause cause more gases.