Hello Thanks for your question You are having headache and there is no cold in recent history so there are very less chances that the pain is of sinus origin. Your headache is associated with nausea, dizziness, blurred vision, fatigue, nausea, forgetfulness. As per available information the headache is most likely migraine in nature. Migraine is a type of headache that is a pulsatile type of headache mainly in frontal or temple area and is usually severe. It is commonly associated with nausea, vomiting, weakness, blurred vision and some times dizziness is also present. It usually responds to common OTC analgesics like you are taking (brufen) Treatment options are analgesic drugs (like brufen, paracetamol) and many spray formulations which are available in common chemist shops. So there is no need to worry about sinus infection, wait for some days and if headache persists then visit a doctor for migraine. thanks hope I cleared your doubt take care