I've been getting frequent headaches for about the last 5 months; on average about once a week. they are sometimes debilitating or severe.

Headaches: I recommend you see a doctor to be evaluated. They are so many potential causes for headaches.

Tension: A common cause is recurrent tension type headache which are stress related. However get checked for visual problems. Migraine is less likely but you should be evaluated by a neurologist as these headaches have been occurring for 5 months.