((Capt)) am I remembering correctly that you have problems with your eyes? Flashing lights and headache could be a migraine but could also be a detached retina or posterior uveitis. You need to see your ophthalmologist urgently.

The most common type of visual migraine aura looks like a tiny sparkly dot that slowly gets bigger, turns into flashing rainbow zigzags and creates a blind spot. Did it look like that?