Gosh Popsycal....
you poor thing....what a nightmare...
it seems there are two different issues...one with DH and also the sleep issue.
First of all DH - bear in mind that it might be his upbringing etc that is making him like this, not making excuses for him but maybe he has been brought up to believe certain things are "women's jobs" (I am in mixed marriage and also same type of thing, DH has never changed DS's nappy or things like that..) and some men just need a bit of encouragement?.. Maybe you could write a list of stuff he could do, like maybe he could do the bath/bedtime story every night, would give you some time to yourself and gives him some responsibility without being the yukky jobs.
Also maybe the nights before you have to go to work maybe you could arrange to take it in turns to get up - then the nights when you don't have work the next day you could get up.
Have you tried using a dummy/some other sort of pacifier, also have you tried music?
RE the sleep, although it is worrying re the sleep apnaea etc and I hope you get some good answers, it def sounds like he KNOWS you are going to keep coming into his room etc etc so he knows he can keep it up until you do? Although CC is harsh and the whole reason I came on here tonight is cos I felt guilty about doing it myself tonight, I think in the long run it def does work?? Maybe it's worth another shot?
Argh! it's such a nightmare. Big hugs and re DH maybe from tomorrow although he is being a pain you could try starting afresh and hopefully things will be better, it's soooo hard when you are so tired tho.
have you got any in-laws etc that can take both kiddies so you can get a break and catch up on sleep??
big hugs..