I think I might be dying?

last night while visiting my girlfriend my body started spasming and twitching uncontrollably. I didn't know what it was and it continued through the day today. At one point I fell over and smacked my head against a kitchen counter and lost consciousness for a few minutes.

Coupled with that I've been hallucinating. Well it's more like being asleep and dreaming but still being awake. I could speak and apparently I was describing hallucinations to my girlfriend and she would be able to hear what was going on but to me I was asleep.

She said I couldn't move and my body was stuck but my eyes would open and close and then id speak to her about what was happening in my dreams and what they were about but sometime's I'd freak out and my eyes would roll round to the back of my head.

After the kitchen incident I was fine for a little while but when I started watching TV I fell onto the ground and it began again. it's been happening randomly and I'm pretty scared at this point. If anyone can help me I'd appreciate it.

Thanks