victoria - I was the same, I always believed my marriage was one which I had to work at, it wasn't until I was telling my dad waht was happening once i'd come home (bits & peices not all of it) he said you do realise this man has been abusing you. :( - and that was after we'd been together for 8 years. I thought I had to work harder. :(
it is possible especially with your other health issues.
I'd say this isn't the first time and it is assult, he KNEW you took tablets- remember that and wasn't planning on you waking up - ALSO REMEMBER that. He might well only do it at time's you've taken the tablets - from this POV what sort of a man gets his jollies by doing this to a woman 9much less his wife whom he's suppose to adore cherish & protect) when she's literally unconscious, I agree it is on a par with the date rape type of a thing when it comes to the POV of you not knowing & having zero control over your faculties.
your DC maybe in danger, they may not - you know them, and their behaviour. however a man who does this to his wife, I agree has no concept of personal boundaries - you are NOT his property and he is NOT entitled. I would be protecting my kids at all costs.
have a chat with your mum, asatain exactly what's been happening. Also I assume you're still in contact with your health team? - if so i'd actually speak in confidence to one of them, to get things off your chest, but also it is (I think) too bigger thing to deal with alone and given your history you will need to have some RL support.
SS will not take your children away at the first opportunities, but they will help to support you & dc if you chose that route, as i'm sure your parents will do - if you choose that route your parents and yourself will be able to look after DC's to ensure that with a little extra help DC's stay with you. When you talk to your H expect him to say it was a one off, your imagining it, it was nothing big. but he has VIOLATED you at the very very least.
(oh and the poster who said about sexual boundries pushing - DP & I love doing this, however we discuss at length first our ideas, we then think on things discuss again and then agree a time - he's all for a bit of morning action as am I - however we wake the other up enough so they're fully aware of what is happening & able to say get off if they want to)