Epileptic Dog

Hi evrybody, it's been a nightmare day and i am sure everybody who's dealing with epilepsy would know what i'm talking about - 7 seizures in one day and the sad truth is that i cant seem to find any way to help her. So here's the case:
I have a 5-year old dog, when she was 2 she started getting the seizures - like ocne a month, but sometimes 4-5 seizures a day. Icant describe the seizure itself because it's different every time. I mean, sometimes its very light and she stands immediately. but other times it's violent and starts with a loud cry, she is jumping and bumping into stuff and fences.
when she was a puppy (before the seizures occure) she was very restless and biting. i mean she used to bite really hard even when playing. She was uncordinated in a way triping and bumping so i assume she might have hit her head and that caused the epilepsy. She is very very stubborn, likes company, afraid of thunders and loud noises and sudden moves. Eats a lot but she's lean. after seizrues she loses apetite and drinks only a lot of water. When a pup, she was sneezing a lot in spring time and used to scratch her ears on the inside, the vet couldnt explain why. She's not doing this anymore.
During the convulsions she fell on her back, lose urine, her jaw locked, trembling and shaking. during the violent ones she stands and lose balance and falls again. The thing is she always try to put herself and mostly her head in a narrow place, like under a chair or behind a plank and its really hard to keep her away from injury. She bites her tongue sometimes. After that she is violent she even try to bite, she wants to be left alone,wants to walk, and an hour later she falls asleep. now seizures occure more often - may be on every 2-3 weeks. I forgot to tell she's chilly, i mean when it gets cold she trembles, i even have to put some clothes on her sometimes.
For any other details you can ask me. I hope someone can help us and i want to thank anyone who will spend some time on our case trying to help. It means a lot :)