Digestive problems

According to your information, that your symptoms (bloating and sharp pain in the lower abdomen) happen only when you work at your office and never at home when resting and all the negative medical tests, it seems to me that your problem may be stress related. If you had some “structural piping issue” you would have the problem all the time no matter if you are working or resting. A colonoscopy can tell us if you have an organic disorder in the large intestine. Sitting in front of the computer should not cause any digestive problems. Diet can cause digestive difficulties but that should not be related to work or an exact time. Stress related digestive difficulties are usually put under the category “Irritable bowel syndrome” (IBS). You can discuss with your doctor about taking a spasmolitic drug in the afternoon to relief the pain.