dear Florrie, I'm so sorry for this situation you are now in, especially when your husband has tried to start his own business, with the hope that it will take off.
I do believe that you are heading well and truly into depression, and having long term problems is an additive to this illness.
Starting a business requires money, time, advertising, planning and who to market, it's an enormous effort to achieve all of this, with the prospect of having no trouble.
Even this puts a lot of strain on both of you, and when it becomes a real struggle our minds begin to become perplexed which makes us head down hill into depression.
It's also a worry for you about the money you have invested into starting this business, and if need be whether any products or equipment can be sold to recoup some money, if this is the case.
I would suggest a couple of things, 1 both of you go to centrelink and put in the forms required, they will ask about the business and how much money you been making, and if it's minimal then there should be no problem in getting payment from them, or tell them that you are closing your business due to several factors, and if you are working part time then your centrelink payment will be adjusted as per say.
2 It would be a good idea for you or the both of you to go and see your doctor soon before it becomes a more major problem, and it's heading that way, and I am so sorry for you.
The next few weeks aren't going to be pleasant, I certainly hope not, but all of this may create friction, and that's what you don't want.
Take care. L Geoff. x