If you are living alone mix up the following solution and keep it well sealed in a bottle in your fridge, so it is to hand when you need it. If you have a spouse than instruct him or her to make it up when your migraine starts.
How do you make saline solution for vomiting?
The "Simple Solution" - Home made Oral Rehydration Salts (ORS) Recipe
Six (6) level teaspoons of Sugar.
Half (1/2) level teaspoon of Salt.
One Litre of clean drinking or boiled water and then cooled - 5 cupfuls (each cup about 200 ml.)
This is not a remedy for migraine unfortunately, but by taking a teaspoonful at a time while you are vomiting or having diahorrea you should be able to remain hydrated and to lessen the vomiting and tummy upset. Vomiting or diahorrea cause dehydration and dehydration increases vomiting, diahorrea and headaches, so it is a vicious circle that must be stopped.
And if your GP hasn't told you this, he or she should be shot!
If you are able to keep a teaspoonful down, increase the amount you take slowly. If not keep on with the one teaspoonful at a time until things settle down.
If you have not already done this, while you are well keep a diary of absolutely everything you eat and drink. This way you may be able to rule out that a food allergy is triggering your attacks, or find out which foodstuffs are the trigger.
Perfumes and legal additives to washing powder, food etc. can also cause allergies that trigger migraines. For me white wine is a trigger, as is any cleaning agent or synthetic material, or sizing that contains formaldehyde.
I hope you manage to find out why your migraine attacks are increasing and reduce them again.
Worrying can be a trigger too.
The menopause could be a reason for the increase, if you are at that time of life, but you didn't mention your age.
So can stress, so unfortunately you have a fair amount of detective work ahead of you if you are to find the cause for the increase or the attacks at all.
When you feel well enough, demand a referral to a specialist - they do exist, and the average GP who never has had a migraine will only write a prescription that does no good at all.