I have a severe headache w/dizziness & nauseous. pain mostly on rs includes ear/neck pain. now my whole cheek is swollen? what could it be?

Migraine or variant: Sounds like a type of migraine. If this is a new symptom, it requires immediate investigation. Could also be temporal arteritis which is a medical emergency because it sometimes leads to blindness. You need to see a doctor asap. Make sure he does a sed rate as well as the usual headache tests.

Could be: Severe migraine headache or sinus infection. If it is that severe, regardless of what it is , warrants immediate medical attention!