All in all, I think you're doing remarkably well. Good job on not being so pursuing anymore!
Your h sounds like he is carrying a heavy load right now, but he's the one who wanted be a dr, right? He has some growing up to do as well if he has never supported himself until now. I'm sure it's a rude awakening.
Yes, believe nothing they say and half of what you see, both positive and negative right now. Reason being, he is "confused." God, it felt so lame to type that out, but I hate "THE FOG" because it removes so much responsibility from a WAS.
Your h needs to miss you, to feel some consequences for his actions; and that means not being too available to him.
Try not to react when he talks divorce again; that will just cause you to spin. Just try to keep your cool like you have been.
Don't look for excuses to see him either. WAS's are notorious for trying to string you along with little crumbs of affection and false hope.
Hang in there, sweetie.