Hi, If you consider, it may be a tension headache or migrainous headache or pheochromocytoma etc. Nausea, fatigue, stomach pain may be viral flu with gastroenteritis. Until an examination is done, it is difficult to say what it is. Avoid spicy food and alcohol avoid smoking and caffeine drinks. Use tablet Pantoprazole before breakfast for one week. Drink plenty of liquids. Check blood pressure. Use tablet Tramadol with paracetamol twice a day for five days. If symptoms do not improve, please consult your doctor, he will examine and treat you accordingly. Hope I have answered your query. Let me know if I can assist you further.