Did my daughter have a seizure?

my 9yr old daughter was on the computer when she fell out of the chair and bumped her bottom, when she went to try to get up on her knees she said omg i cant see anything and hit the floor face first, she was squirming (kind of cunvulsing) around on her face on the floor and was unresponsive for about 10 seconds, i was screaming her name ( i was terrified) and when she came to she said she remembered everything up untill she fell on her face, we took her to a local hospital and the doctors said she didnt have a seizure but didnt do any kind of tests not even bloodwork and sent us home, but in my heart i believe she did have a seizure...shes never had one before but epilepsy does run in our family, so does that sound like a seizure? and what questions should i ask her doctor to be better prepared? and could the computer have played a part in what happened?