I don't know how seizure medication affects periods but I do know that menstrual cycles of many women are irregular when first getting off of birth control.. some start spotting and/or bleeding for days on end while others do not get periods for months on end. I think it all depends on your system and how long you were on birth control prior to stopping.
some anti seizure medications can make the pill ineffective..... i would get a blood pregnancy test.
my mother has seizures and she was on the pill when she got pregnant with me
I just stopped birth control over a month ago and still haven't had my period. Have had no sex either, so I'm not pregnant.