Hi there,
Yes, you should go to the doctor! This
headache has gone on for too long... if a
headache does not get better with home treatment, please go to the doctor. Also, if a headache does not go away for over 3 days at all, like no relief at all, then you can even go to emergency. If you feel you cannot handle the pain, please go to emergency. If the headache at any point becomes "the worst pain imaginable" then also please go to emergency. If you can't drive, phone a taxi...