With all that going on, any reaction seems kinda normal to me, in a really weird sense... That's just too much to have on your plate at any one time.As for the epilepsy, that's an intriguing idea, and I really hope you follow up on it and report back.
The symptoms you describe remind me of some of the signs I'm getting depressed, though. The sleep disturbances, the irritibility, the part about forgetting those - you know, what are they called? Oh, yeah - words... Those are usually signs that I'm falling off the floor.
The light show is something else again, though. I don't know much about epilepsy, but it sounds a little beyond simple depression. (How's that for humor? When was depression ever simple?) If it helps you feel a little less alone, I see colors and lights at orgasm. I've been told it's a case of random synaptic activity in the brain with the release of tension. I can't see any mechanism like that in your case, but at least we share the effect.
Good luck to you.