autism and now siezures?

I emailed the website already but wanted to post too.  I take care of an adult with moderate autism, who now we suspect is having siezures.  So far ive seen her whole body drop completely, her head drop, seen her whole arms and/or legs stiffen up, seen her jump her arms or swing them up in the air randomly, seen rapid jerking, seen just also random jerking, eyes rolling back, whole body jerking, mouth drooling, staring off into space then jerking, and so much more(none are diagnosed yet, we called the neurologist, waiting to get back from them).  Shes been drooling more and more, and is constantly tired, on top of that, lately shes been feeling sick to her stomach, losing her breath and having a hard time breathing, having mini faint spells, dizzy spells, she threw up the other day, and having lots of gas too.  She is also having we assume siezures in the night, she woke up with her tongue swollen, bit, bloody, with a pillow half way down her throat, choking on her drool, etc.  I honestly don't know what to do with her.  Are these siezures? she is now having a lot of problems breathing, like catching her breath, out of breath, etc, are those related to siezures? 

She is verbal to a point, has her days, but uses more sign to communicate, so I'm going mostly from what I see.  I honestly think the whatever she is having started becoming more frequent, which i am sure at least 50 times a day, at least, due to severe head-banging(we have been working on her head-banging for years, she has got a lot better then she was as a child).  She has been head-banging since she was a child, would that play a role in siezures too?  I apologize if i seem sort of lost or dumb-founded, but she already has so many differculties with autism, that we never thought we add siezures to the mix, so now I'm at a loss for answers, please help?

 JIM