Hi there
Just wanted to say I hope youre starting to calm down a little bit now. I have 4 kids and every one of them has had a convulsion at some point. Only one has ever remained an epileptic. Its just worth going through all the test to make sure that he isnt one of the few. I myself have suffered seizures but nothing too bad and I lead a very normal life.
The thing is, we all have the potential for a seizure, some people have a lower threshold than others, in babies and young children this threshold is lower, so they can frighten the living daylights out of us even when they seem to be getting better. The main thing for you is to start calm, it upsets them more if you panic, (well and trully easier said than done, I know).
I really hope your little ones tests come back negative and that he has no more episodes. If you want to know any more about it, I would be happy to pass anything on to you.
Good luck, I hope you manage to come back down to planet calm, very soon.
Lots of love.