Bags of sympathy, Grandyma.
I was told when I started migraines at the age of 11 that I’d grow out of them. Fifty five years later, I’m still waiting. 
Have you tried any of the triptan drugs? They almost always work for me, although I try not to take them too often.
There are some preventative drugs, too, although they can have side effects.
Other things which have helped me have been two Solpadeine tablets dissolved in a glass of ‘full fat’ Coke. Also sometimes a light, sugary snack such as rich tea biscuits can curtail a migraine, although I’m fortunate in that I don’t often get nausea so I can eat.
If your GP isn’t very helpful, ask to be referred to a migraine or neurology clinic.
I hope you feel better soon.