a little insight please

I want to start this post by saying that I have not been diagnosed with epilepsy and I have never be treated or thought to have epilepsy in the past. However, about two months ago I think I may have had some kind of seizure while asleep. My wife tried to wake me up and I was somewhat aware of what was happening, but I couldn't control it. Then about a week ago, my wife woke me up in a panic. She said that I had been shaking violently in bed, went rigid and then finally limp and she was having trouble waking me up. I have absolutely no memory of this, but my wife was shaken by this. Also, when I was very young, I can remember the bed shaking violently several times. I used to think it was a ghost in the room. My wife thinks that the bed shaking could have maybe been me shaking. I have an adjustment with my GP on March 9th regarding an unrelated condition and I have been waiting until then to tell the doctor about these episodes which appear right now to only happen at night. My questions are, 1) can epilepsy be confused with a shaking bed during childhood? 2) would a sleep study have turned up anything to point to epilepsy? I have been diagnosed with mild sleep apnea. 3) should I be more concerned about this? Is it something that should be discussed with my GP before the 9th? 5 more days until the 9th. Thanks for any information you may have on this!