Migranines can be a tricky thing to keep track of when they come on sudeen like that. I have lived with them for over 11 years, and been on countless medicane.

I will tell you this, Go to a doctor who speciales in them and do not take just one opion(sp) on it either. Get two of them and make sure it is just a migraine, not hormonal, since you are a teenager (not sure if you are male or female) Because differnt bodies react differntly to medicane..
I hate to say this but excedrine is one of the worst migrane meds to take because of the CAFFINE in it.. it can make your headace come back "tenfold" after it wears off..

Triggers of migraines are
1. Wheat
2. Chedder/ or aged cheeses
3. Caffine in any kind of drink
4. alcholo (spelling sorry) of any sort
5. chocalte any kind of this flavor can cause a migrane
6. not eating 3 well balnced meals a day

ther are other triggers to cause them, but these are the main ones that cause mine...

I am not a doctor, but I am on many differnt forms of treatment, and very few have worked for me over the past 11 years.

Pm me if you have any other questions ok..