So sorry to read this. I was just like your DS, mine started when I went through puberty at 10 and suffered until I was old enough for someone to give me a pain killer at 19. Here I am at 40 and Fioricet is still the best thing that I ever came across. I don't know if they will give it to your DS since he is so young. There is a very real chance of addiction. I have never been addicted but that is just me, I am very careful with the medication and will suffer through a headache once I hit day 3 just to prevent rebound pain. I have been through many headache clinics especially when I was your DS's age range and everything they gave me was a failure. Be warned, even the best Neurologist is just guessing and you'll see that if you stick around long enough to realize they just throw stuff at you like a shotgun blast and hope something sticks. The medications they are offering can be very dangerous so if they do not work do not let the Dr's convince you to keep at them. Don't be afraid to say NO, they will come on pretty strong like they have all the answers, it's just the nature of Neurologists... they forget they are just trained men with an opinion, no more and no less. As a chronic sufferer MHO painkillers are the safest most effective way to deal with migraines... that is as long as you keep things on a short leash, recognize the possibility for addiction and take steps to avoid it. I have 2 kids and my DD shows many signs migraine, but so far hers aren't nearly as frequent as mine. If they do escalate we will cross that bridge, but at least she'll have me, I had no-one helping. I remember shutting myself up in my room with construction paper taped around my windows to keep the light out... oh, how I suffered back then.
FYI, I have been getting migraines virtually every day for the past 33 days. It's been this way every Spring for as long as I can remember. The Neurologists say they aren't related to allergies but I have my doubts... if they can't say what they definitely ARE how on earth can they say what they definitely ARE NOT
PS- if they do give your DS a painkiller please consider breaking the pill, whatever it is, into 1/4 bits. The one thing I have noticed is that when you do get an ok the Dr's tend to give waaaayyyy too much. Even for myself after all these years I start off with 1/2 wait 20 minutes to see if there has been an effect, then if necessary I take the other 1/2 and on and on. Some days the 1/2 is enough, other days I need 2 tablets and 1/4 Vicodin... it all depends so I treat each headache as an individual event. However, once I find a therapeutic dose I stick with it until the headache is gone. I have never found the pain level of a headache to diminish over time. It is what it is and is either there or it's gone, no in between.
Another thought, he should probably get an MRI if he's never had one before. Both of my kids DD11 & DS12 had them around the age of 9 when their headaches began to pop up. Many migraine sufferers, like myself, have spots on our brains. The first one was considered an anomaly I may have been born with or a sign of a stroke I may have had as a teen. Another spot just popped up 2 years ago. It would have been best if they had a clean one to start out with though. I do have a high family history of stroke and some studies show links between migraine and stroke but not all Dr's embrace these studies.
I hope you find something that helps, whatever it may be.