Does your H have separate finances from you now? Do you and he share any bills or cc's? If so I recommend getting him off the record so to speak. D will actually help you with this - his debt is his debt and his accounts and bills are his - and legally you will not go down with him.
Financally, D will protect you. Emotionally no. D can be drawn out not only financially but by busy lawyers - you take your time getting your info to your L, the L leaves it on his desk a while, you have to send papers back to him and his L - it can take years. SO there is hope that if you stall enough he'll come out of the fog, OW will dump him and you'll be stronger when he returns! IT's happened to a lot of folks on this board - don't give up! REad some "Piecing" stories - filled iwth people who faced OPs and Ds and it turned around eventually.