So sorry you are having migraines. I started having migraines when I was young but then developed a different kind of migraine/migraine-like headache after my concussion. Mine have now gone away except for after very long bike rides (4+ hours). If I don't ice my neck right after I will get a terrible, throbbing headache.

I also had balance problems and vertigo. Again, very likely related to the neck injury.

I flew to Buffalo to see Dr. Leddy at the University of Buffalo concussion clinic. He is the one that cleared me to get back on my bike and sent me off to physical therapy for my neck. Here is a detailed post: http://neurotalk.psychcentral.com/post775819-12.html

I'm not saying your problems are caused by a neck injury, but it's definitely worth looking into. Good luck!