Hello !
I read your question carefully and understand your concern.
I think your symptoms are very likely to be migraine. The blurring vision and
numbness in your arm and hand are migraine aura, common symptoms preceding
migraine headache. I don't think that there is a connection between your ear troubles and your migraine attacks. Two attacks per month are not too much.
I would recommend treatment with Risatriptan or
Sumatriptan within the first symptoms preceding headache. These drugs are very helpful for the pain relief in migraine attacks.
If your attacks become more frequent, you should consult with a
neurologist, have a good physical examination and other tests to rule out other causes. A prophylactic treatment may be initiated in that condition.
As for your ear you should consult with a ORL specialists, if the pain persists.
Hope to have been of help!
Greetings, Dr. Abaz Quka