Hi welcome to HCM... In history yes you are having migraine ... In migraine aura and flashes of light can be present ... Here when acute attack of migraine rizatriptan 5 mg tablet can be taken and if needed repeat after 4 hour if extra dose needed ..... If your migraine attack severe and frequently repeated with more than four times in month than prophylactic drug amitryptillin needed .... Avoid precipitating headache factors like ... -smoking -irregular meal -lack of sleep -hypoglycemia -stress etc.. Hope this will help Advise : physician consultation for neurological examination ....