Any ladies suffer from gran mal seizures?

I'm 29 and had my 1st gran mal seizure Nov 4, 2014 at 3am, had an EEG, CAT scan, MRI, & blood work but they couldn't find the cause so I didn't want to take the medicine because of its bad side effects. I had 2 more seizures Feb 16 2015, 1st at 3am again and 2nd at 11am. All 3 where while I was sleeping. Sadly still have no cause but I do take medicine but my husband & I want to start a family but I'm now worried about what the medicine can do to a baby. Anyone have any helpful info? I would greatly appreciate it