Does anyone know anything about seizures?

Hello. I suffered from Dysmenorhea (Terrible Period Cramps) for years in High School to the point where I would cry and get very weak and pale and sometimes p out. One day I finally had to go to the Emergency Room and they put me on Birth Control. I started taking that and it's going to be my 2nd year of anniversary of taking that crap. For a long time I was taking Ortho tricyclen and that would make me vomit and p out as well. I finally started taking a new birth control that wouldn't make me sick but still occasionally would p out and wouldn't know why. I also have a big problem with gas. I have to be very careful with what I eat and take a lot of alka seltzer. The last time I ped out it wasn't just fainting. I had a seizure, and my parents say it was terrifying. I went to the emergency room and hey did a EKG and a CT scan and said everything was normal so I'm very confused. They say my muscles tensed up, my eyes were open and I had a face of horror and it looked like I wasn't breathing. I woke up after about a minute and was very pale. My whole body felt numb and took time to get my feeling back. I burped alot and had to use the bathroom and throw up as well. I am also worried because I don't know if the problem comes from my brain, my stomach, or my reproductive organs. I don't have insurance either and it costs alot to go to the doctor. Does anyone know what the problem might be? I've been healthy my whole life and have always been normal until I had that problem with period cramps.