Hm, is he the kind of guy who thinks external changes will make all the difference? Just thinking back to when you were saying he likes to please others..which means he's not sure where his 'centre' is, if you see what I mean?
To look at it positively though, the new job could mean a fresh start for him.
I think until he has a diagnosis, it's a bit unclear where this is headed.
But while you stay strong and keep nuturing a welcoming home environment for you and bub, he will continue to be attracted to you. In time, if he get's well, I am sure you'll start to be attracted to him again.
I realise this time must be a bit frustrating for you. Luckily you have work to distract you, not to mention fellow DBers!