Our out goings is more than what we've got coming in
Have you thoroughly reviewed your finances, to check you aren't entitled to benefits, or if there are any costs you can cut down or cut out completely? If you have a low income and 5 DC, you should get quite a reasonable amount of tax credits/universal credit. But are you meeting the income/work requirements?
If your DH isn't earning the equivalent of NMW due to his self employment, and there isn't any chance of that in the near future, he may be better off looking for paid work instead. What does he do?
Is there any chance of you working when he is at home to look after DC?
Go through the Moneysavingexpert money makeover.
If neither of you have more than £20k in debt, and you have no assets or surplus income, a Debt Relief Order might be appropriate, which is like a simpler, cheaper form of bankruptcy, and you won't ever have to admit being bankrupt, because it's not actual bankruptcy. It will ruin your credit rating though, but that's not a consideration at the moment, and getting rid of the debt is the main priority.