I wonder
@nmr1991 if you eliminated gluten from your diet for 30 days if that might give you relief from your headaches.
Can't really afford to go on a gluten-free diet seeing as when I look through the gluten free aisle at the supermarket it is noticeably more expensive than the gluten counterpart. Although you didn't ask me to look at gluten-free foods that would otherwise be full of gluten, it's hard to see what else I would eat apart from such foods since I have a repulsion against certain foods like eggs, nuts, cheese, alot of meat products.
My diet would usually consist of:
junk food (chocolate biscuits, diet carbonated drinks, crisps, rolls/pastries, milkshakes (source of calcium, but high in sugar), desserts, microwave dinners),
"proper" food (sparkling flavoured water, meat pies, cheese snacks (rarely), pepperami sticks (main source of protein), buns w/ slices of ham and low fat butter, instant soup/tinned soup, stick of celery (occasional), prepared food (oven cooking), skimmed milk(low in fat as taking statins))
I would ask a nutritionist but they take at least 3 months to book an appointment and in my experience their advice didn't help in the past as it mostly applied to type 2 diabetics.