Although these could represent a migraine variant, given your recent history of an acceleration/deceleration injury from your accident, my biggest concern would be for a
carotid artery dissection. Essentially, what this means is that the layers within the artery have torn and eventually over time, blood flow may propogate that tear which can result in either blockage of the artery, formation of non-obstructive blood clots, and aneurysm formation.