Did you call her two weeks later or right away? If she increased your meds right away then it's probably your meds making you tired due to an increase. However, if it has been two weeks between the seizure and teh time you called, you could be having more (nocturnal, or whatever lingo they use these days) which is causing you to be tired. If you seize during sleep, or don't establish good REM sleep you will be tired (I have this problem).

I'd chat more but the mother is in town so I have to entertain.