Types of seizure

I heard, there are some different types of seizures depending on the diagnosis, duration and frequency. So far, I couldn’t pinpoint my problem even though I did some tests. The last seizure happened a week ago, it made me so horrible and frustrated, why? Because I took the medicine half an hour before it happened. I don't understand what the effect of the medicine is. If it doesn’t work, what’s the next step to prevent from those storms?