A.  As per your height and weight, you are slightly underweight (body mass index 19.4). You most likely do not have an allergy to these food items, as that would have caused a rash, vomiting, pain. You may have food intolerance to these food items including lime, oranges, tea and cucumber. These items contain citric acid, cellulose etc, which may cause bloating and discomfort. The anxiety levels lead to an irritable bowel syndrome. Cucumber has large quantities of water and is used by people fighting obesity. If you plan to gain weight, take a high protein diet including eggs, soya, paneer, etc. You can also take protein supplements. Vitamin B 12 is present only in non - vegetarian food items and is lacking in fruits and vegetables. Your levels are low, so continue the supplement. Also get a stool sample checked to rule out any worms, infection or malabsorption. What is your ESR? In case symptoms persist, colonoscopy maybe planned. A regular exercise routine will also help to reduce anxiety and improve bowel movements.