I think your problem is easily fixed. Is if you know to go to work early and do not have time to eat. Why do not you carry bread in your pocket. Because you can eat when you feel hungry. For the exercise If I were you I will try to take time for the gym three days a week. And the last issue I recommend you eat fruits and vegetables regularly. It can make your digestive system better. If not successful, I think you should go to the doctor to discuss the problem.