Wow ~ Very scary. It's VERY possible you had a seizure. That would NOT show up on a scan. At least not the first one, I wouldn't think. That's about the only think I can think of that would cause this. It really sounds like a seizure to me.
It doesn't have to be epilepsy to be a seizure either. These can be caused by a number of reasons. I would urge your doctor to run a complete CBC as well as checking your vital mineral levels. Have him do a complete workup, and see what he comes up with. Low/high levels of certain minerals, etc can cause seizures -- so let us know what happens, ok? I hope you can get out of this charge! I KNOW this was medically caused! God bless and take care. Hugs, Lee