"she is on epilem but it doesn't help her much because of stress"
I do not know too much about epilepsy, but from what you stated, perhaps helping her relax and keep calm under stressful situations would help with the attacks, as, like you stated, stress can be a big part in triggering epileptic seizures. Perhaps she should start meditating or simply finding times in the day to relax and take a few deep breaths to calm her mind and state of being down, it would possibly help.
From the little I have read, another trigger for epileptic seizures could be lack of sleep, so it's best if she receives plenty of rest as to keep her from entering into one of these attacks.
Last, alcohol and drugs can also trigger these effect,s just in case it is now known.