Keep pushing until you get an answer that is to your satisfaction. I can tell you that it is POSSIBLE that it is "just" a migraine or type of head pain. However, it could be many other things also. I had to fight for years to get the best care, and its unfortunate but thats what has to be done sometimes!
Write down how you are feeling, using specific "pain words" like stabbing, aching, heavy, pressure etc and keep track of what you are eating as well as your activities. It really can help the right doctor see how you are really living and how its affecting you!
Im sorry I dont have an "answer" for you!
Please keep us posted on how you are doing!