did i have a seizure?

I have recently started training in jiu jitsu. Today was my second time sparring, and i think i had a seizure. i'm guessing it was around 10 seconds long. I was on my back, and my sparring partner was on top of me, and all of a sudden, i couldnt move my body. my hands dropped flat and so did my legs. my eyes were pouring out tears instantly. i tried to get my head flat on the ground, but it stayed up and kept nodding and shaking back and forth. my eyes were bulging and i couldnt look anything other than the ceiling. I was conscious the whole time and in much pain, so i'm doubting it was a blackout or a pass out. was this a seizure? I've never had a seizure in my life, so i'm not sure if this is a sign of something more serious. i am six feet tall and around 260 lbs and when i do jiu jitsu, i'm too embaressed to take breaks or accept my limits, so maybe that had something to do with it. thanks!