How serious are intermittent dull headaches? 

I’m working myself up as I have had an intermittent headache for about a week now. The pain is not severe by any means (2-3 on a scale of 10) and it is not constant (lasts only a second or two). The pain is not in one specific area but, more located in the front of the forehead and above eyebrows sometimes in sinus area (but I don’t have any other sinus related issues such as congestion but, I do live in New England where the weather is inconsistent). It’s almost more of an annoyance than anything and due to my health anxiety I hate the idea of running to the doctor for every little pain or sensation. 

I’m not sure if the cause is computer work, weather/allergy related (although I don’t have any symptoms otherwise), due to strenuous workouts or the stress of constantly worrying about having a tumor or something serious. I am doing my best to stay away from googling symptoms as I know this will only worsen my anxiety. 

Any thoughts or advise would be greatly appreciated.