I know you are worried about H b/c you haven't heard from him, but this is normal behavior for a WAS. Sometimes they will go dark for awhile. They get caught up in their "new life" or who knows maybe this is a way to punish the LBS. All I know is that DBing tells you that you can not control another person and that this is there problem not yours. Just try to keep telling yourself that you can't help your H right now. He knows that you are there for him if and when he is ready to contact you. This is all you can do now- let him go and find his way!
I know this is very hard to do, believe me I struggle with detachment everyday, but it is a must if you want to keep your sanity!
I agree that you need to get a legal S in place to protect yourself financially. I speak from experience for my H isn't paying any joint bills right now b/c we do not have anything legal. He knows that he can get away with it right now so he is taking advantage of it. In my case H and I can't agree on what is fair and what is not fair financially so nothing is happening
Have you seen a lawyer for a consultation yet? Most do them for free. At least they can give you some legal advice. It sucks that the LBS even has to pay anything towards a D since we are not the ones that want out of the M, but unfortunately we are forced into it to protect ourselves. If your H gets mad at you for going for legal S, just say I am sorry you feel this way, but I have bills to pay and want what is best for S4.