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. So 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 only. And the last issue I suggest you give interrupt 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.