Oh dear gillybob what a dreadful day you had yesterday.
Your dad, who should have been a source of comfort for you just made it all harder. So sorry the doctor didn't have better news for you.
I think the time has come now for you to concentrate on yourself and think about what is best for you for the future.
Obviously your husband is still your first concern, and of course you hope he will make a good recovery, but nevertheless I can well understand how finances are a real worry to you.
Building societies are usually sympathetic in situations like yours and often offer a mortgage 'holiday' , likewise whoever the debt on the house is with may do something similar if you contact them and explain the situation. The important thing is to keep in touch with them, and keep them up to date with the situation.
Regarding your business, as I have said before, could someone experienced be put in to manage and run the business for the time being ? It is your livelihood, yours and your husband's and if you can keep it ticking over to provide some much needed income, well that would be one less thing to worry about.
Meanwhile I do hope your family is supporting you in all this. You do so much for them, but now it is you who needs looking after. You are their mum in a desperate situation, so I hope that help is there for you.
Hope you get a better night's sleep tonight, but it is so hard to shut our minds off at times, isn't it?
Very best wishes to you.