Hello just want to clarify if what i'm experiencing is migraine, aura just suddenly appears and lasts for about 15-30 minutes after that, i do get headaches lasting for 2-3 hours. i feel sick and feels like want to vommit. i also lost my appetite?

You should see a doctor and go over all your symptoms and the timing of everything to be sure what you are experiencing is migraine. What do you mean by aura, for example? You may need to see a neurologist to confirm the diagnosis and make sure it is not a form of seizure, for example. Then, once the diagnosis is confirmed, treatment can be given. Best of luck to you!

Although your description is quite vague, and not clear what constitutes your auras, the sequence would likely be most consistent with episodes of Classical Migraine. Unless you experience episodes of altered consciousness, this does not represent epilepsy. See a neurologist and obtain appropriate treatment, as these can be prevented.