hello
As you have said you are a patient of diabetes , complaining of new onset
headaches, partially improved with advil, but had stomach, vomiting and vision problems with family history of duodenal ulcers
following are your plausible causes
Diabetics have
stomach bloating and duodenal ulcers problems due to antibiabetic drugs + diabetes itslef known as diabetic autonomicpathy
Migraine has bimodal distribution that is one starting in teenagers other in 50-60 years, as your symptoms of headache with
severe vomiting,
blurred vision, stomach problems during the attack, diabetics are more prone to migraine.Advil gave you relief another point leading to migraine.
Cerebral
venous thrombosis , meaning your vessel in brain have partial bloackage , again diabetics are more prone or this , you need an Mri with Mrv for that + eye specialist review to see inside your eyes
Hope this message solves your problem
Take care