as per your symptoms in my opinion.. most common medical conditions indicated by the symptoms dizziness, fatigue, headache and nausea or vomiting including Acute sinusitis, Diabetes, type 2, and Heat exhaustion. There are more than 150 conditions associated with dizziness, fatigue, headache and nausea or vomiting. most likely mimicking your symptoms are listed below . Acute sinusitis Acute sinusitis, an inflammation of the sinuses, causes sinus pain and tenderness, facial redness and more. Diabetes, type 2 Diabetes can make you feel hungry, tired, or thirsty; you may urinate more than normal and have blurry vision. Heat exhaustion Heat exhaustion causes intense thirst, heavy sweating, pale, cool, and moist skin, muscle cramps, and more. Sleep apnea People with sleep apnea stop and restart breathing multiple times while sleeping. Tension headache Tension headaches, caused by muscle tension, are marked by pain, pressure and tightness around the head. Low blood pressure Blood pressure is the force of your blood pushing against blood vessel walls as it circulates through your body. When your blood pressure drops you can have symptoms like dizziness or lightheadedness, and fatigue. Other symptoms include: nausea thirst blurred vision fast and shallow breathing pale, clammy skin trouble concentrating. Anemia Red blood cells carry oxygen to all your organs and tissues. When you have anemia, your body doesn’t have enough red blood cells, or these cells don’t work well enough. A lack of oxygen can make you feel dizzy or tired. Other signs of anemia are: shortness of breath weakness fast or uneven heartbeat headache cold hands or feet pale skin. Migraine headaches Migraines are intense, throbbing headaches that last from a few hours to a few days. Along with the headache, you may experience symptoms that include: vision changes, such as seeing flashing lights and colors nausea and vomiting sensitivity to light and sound lightheadedness fatigue People who get migraines can experience dizziness and vertigo, even when they don’t have a headache. The vertigo can last for a few minutes to a few hours. Vestibular neuronitis: An infection like a cold or the flu can inflame the vestibular nerve in your inner ear. This nerve sends sensory messages to your brain to keep you upright and balanced. Swelling of the vestibular nerve can cause dizziness and vertigo. You might also feel fatigued. Other symptoms of vestibular neuronitis include: nausea and vomiting trouble concentrating blurred vision A virus usually causes vestibular neuritis. Antibiotics won’t help, but the dizziness and other symptoms should improve within a few days. advise ; Drink plenty of water throughout the day so you don’t get dehydrated. Avoid or limit drinking alcohol. When you move from a lying or seated position to standing, get up slowly. note please consult physician and ENT specialist. I hope you happy with information kindly rate it. thank you.