Migraine with aura is commonly complained. It can be explained by medical terms called migraine with aura. The smell from the hand is actually because of olfactory hallucination
that I see for a lot of my patients in clinic. The smell would generally disappear as the headache is relieved after medicine plus good sleep. It can be treated.
I suggest you to go in migraine prophylaxis with Rizatriptan
. You can ask your GP for the same. Post menopausal women commonly complain of this. You should avoid coffee and caffeinated drinks.
Hope this throws some light on the nature of problem. This is non worrisome and is easily treatable.