I don't think yu should ignore this see a dr, have your eyes sight checked (just to cover all bases) could high blood pressure/stress be the cause. Sometimes our body reacts to stress after the fact not just at the time. I get "visual" migraines no pain but can't see because of the shiny rivers or patterns of light across my vision, I rest they stop I don't then I get the full blown pain migraine.

See the Dr.