this is a typical history of migraine
what you are given.its a common problem more common in females of your age.
it is a condition when your brain nerves become oversensitive and your brain arteries dilate and cause the pain.the episodes can be lastin from few hrs to upto 72 hours.
well with advances in science great drugs are available to curtail the problem
you should consult a physician and give proper history whatever he asks to rule out uther causes too of headache and will put you on proper medicines depending upon your frequency of attacks and response to therapy,,it will be titrated up if required.
so dont worry and consult a physician