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?  

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