Hey, firstly I hope you're ok under the circumstances? Secondly, I could've written this myself as we are also heading in the same direction, except we are now one month in arrears.
My hubby suffered a Stroke back in Sept 2012 and we thought after a month or two that he was ok, so I went back to work and he was looking after boys - long story short, his mental health has deteriorated due to brain damage from Stroke and I had no option but to stop work two months ago, as he does not get DLA, therefore no childcare costs from HMRC 
Do you have the 'Mortgage Rescue' scheme where you live? They basically buy your house, but then you are a tenant as opposed to owner. We too bought ours in 2006, 100% mortgage & interest only (stupidly)
so mortgage rescue would mean we'd still owe our lender a portion but they would have to accept what we can, i.e. £1 a week!
Also, I used to believe the CAB were a waste of time, but my hubby went to see them last week and this time we're getting some real good help.
I know we'll probably end up down the mortgage rescue route (which, as a tenant, you'd obviously get your repairs done, as opposed to having to pay yourself, which is a bonus) and I know it hurts, as you, probably like us, worked so hard to build your house up to what it is 
Have you had help from your GP for your health? I've had to increase my Anxiety meds as I'm having a bad bout of it at the mo, but they do help (Citalopram 30mg).
Can I ask what your circumstances are, work wise? Cxx