Migraines anyone?

Does anyone in the BPO family have a problem with migraines?
I'm really starting to wonder if my little boy 2 1/2 has them,
three times in the last couple weeks has has gone to bed really early and woke up acouple times that night(which is not normal), in the am he has said that his head 'was hot' and then within acouple minutes he throws-up where he's standing. He doesn't have a fever and doesn't feel hot, ask him if his belly hurts and he just rubs his head 'no just hot'. After he is pale as pale can be, eyes glossy, his movement is slower but he wants to eat and everything stays down after that. My family does have a history, but my brother was already in school, are there any tests that can be done to tell or do you think it's just a fluke? Thanks for any help and advice in advance ~ Kim