Only you know how bad it is, if real bad see a doctor.
If you live in colder climates a dry heated air in you home and elsewhere and cold outside temperatures can cause some of the symptoms you describe.
See my reply to "bleeding" if you are looking for some ideas on treating a too dry nasal passage.
Do you have any runny/stuffy nose? Sore throat? Those are usually signs of a sinus headache, or a sinus infection. If I were you, I'd either take some OTC pain relievers, or some dayquil or something.