What are you able to eat in the morning? For example, if you were to have a cup of tea without milk or sugar, would it go down OK? Or, something that isn't full of carbohydrates, such as cucumber slices or carrots or celery?
It's possible that your blood pressure is low in the mornings, which can make you feel both nauseous and tired, and certainly your blood sugar will be low. Have you tried eating a high-protein snack right before bed, such as cheese?