Is there a relationship between my migraines and my having raynaud syndrome?

Probably not. Answered but disappeared. Migraine is severe headache, may be aura or neurologic signs afterword, but pathophysiology is dilataion of arteries, and rx is constricting these vessels with meds. Reynald's is a constriction of small arteries/capillaries usually in fingers, triggered by cold air or water, and rx is geared toward dilating the vessels. The two are likely distinct entities.
Be aware. I agree with dr. Kurzweil that there probably is not an association but me aware that some medicines for migraines can possibly make your raynaud's worse.