What Causes Acute Headache,uneasiness,stomach Pain And Dizziness?

My wife aged 38yrs is having acute headahe, uneasiness and dizzines for last 07 days. Same thing happened four months back but dimished after five days. She is slightly overweight by 8 kg.She also suffers from sinus.She normally complains of etching in ears. Her blood test(cholestrol, himoglobin) is normal. BP is 120/80. Sugar fasting and after meal is normal. Her CT scan is also normal, no abnormalities found. She has allergy to dust and moisture. She also has burning sensation and pain in stomach. Doctor has prescribed ALERFIS(Lebocetrizine and Montelukast) , Radeprazole, Vertin OD 48 and ACUVERT 5 Mg. Please guide me.