Migraines and Headaches

I've been having visual migraines where I get jagged vision, usually in my left eye, and progressing from the lower right edge to encompass my whole left visual field. Could this be the result of dehydration?

I was diagnosed with benign positional vertigo. Is vertigo, sometimes accompanied by nausea, a common precursor to migraines? My migraines don't usually have debilitating headaches; the vertigo is the worst symptom.

I am a frequent migraine sufferer and I was told that acupuncture can actually help more than drugs to prevent attacks. Is this true?

I'm a woman (45) who gets frequent migraines. I'm also about 40 pounds overweight. I read somewhere that being overweight might actually increase the number of migraines that I get. Is this true, and would losing weight help?

What is an ocular migraine, and how do I know if I'm having one?

Can Botox help reduce migraines?

Migraine and stroke symptoms seem to overlap. How do I know I'm just having a migraine and not a stroke?

I'm a frequent sufferer of migraines. Does this mean that I'm at a higher risk of stroke?

Will taking progesterone help prevent a migraine?

Now that I'm 50+, I've been getting severe headaches with my periods, and it also seems like my nasal allergy symptoms are worse at those times. Is this just a coincidence, or is this associated with perimenopause?