Fasting with migraines

I suffer from migraines caused by a number of things which I refrain from. Fasting, going some hours without food or drink causes migraines. I wish to fast but know that I cannot as it becomes extremely difficult to the point I cannot focus on anything so devoting my time to prayers and reading Quran will be extremely difficult I also have two small children both under 3 so I don't get to rest much or sleep in. My question is, for me is it okay if I don't fast and instead feed a needy person, as making it up on other days won't help either? JazakAllah khair