Oh you poor thing. You must not blame yourself, you did what you were advised to do by someone who you thought knew best. I personally don't believe that your bird got Epilepsy because of her falling after being clipped. I believe she was probably destined to have Epilepsy from day one. Whatever the reason, yours is a good case for not clipping. I'm so so sorry to read about this sad story and I hope someone more knowledgeable than me can help you.