nick2008:
Mine worked out to be the wife holding a pillow over me head.
Not gonna say what mine turned out to be but left a bit of a rash on me nose and chin! 
Seriously, get in to the Docs ASAP. I remember seeing a thing on tv a while back about a lorry driver who was having really bad night terrors…they fitted cameras in his cab and honest to god, it was bloody scary watching what he went through every night, in cab or at home…they sent him for tests etc but can’t remember the outcome
To add; After a quick dig, the programme is called Goodnight Britain…couldn’t find the episode on YouTube but there are bits of it about. Have a look at this, might give you (and others) a bit of an insight youtu.be/5Hhzk2J1eS0
Little bit of a read as well tinyurl.com/jgva68j