I've had a headache for 4 days straight, i just started a new pack on contraceptive pills, could it be that?

Complex: Female hormones may have complex effects, as sometimes headaches seem associated and yet, bcp's may control headaches in others. There seems in some cases, to be an association with estrogen, but not always. Talk to your gynecologist about this, as it is not so simple, and perhaps you are best advised to treat the headache separately with appropriate preventative meds.