Firstly this is coming as someone who had two businesses doing very well pre-covid, one took a huge hit and never got back to where it was, the other kept doing well until a different, unrelated issue stopped it dead unexpectedly earlier this year. So I know exactly what it is like to work so hard for something and ultimately that work amount to nothing, and how hard it is to walk away.
First things first, is it sole trader or limited company?
Secondly you say you can't judge how much it's making or loosing. Change this today. You can't operate a business without a really firm hand on the cash flow. Sit down with the business bank account statements from the last 6 months and work out what came in, and what went out, and importantly WHY that came in and out. If you are solely reliant on this business to pay household bills, but by taking that much out the business it doesn't have the money to take on a new contract or invest in needed equipment then you have to make a very different decision to if there is no demand for your product anymore and it's dying no matter what.
Thirdly you need to mentally reframe it from the business failing to the business was right for a time, and now it isn't, if indeed it doesn't have a feesable hope of recovery. If you have contracts in the pipeline and in 6 months it's going to definately have income again then it's a cashflow problem which has a very different solution to a business with no reasonable chance of recovery.
Fourth, household budget. Not what you would ideally like it to be but go over your last 3 months of spending, average it out, and accept that that is your household burn rate. Your business has been in trouble a while, so what you are spending now is realistically what you are able to stick to. Do you have enough coming in right now to cover this?
What you are doing right now isn't working so you are going to have to make a decision you don't want to make somewhere. One of you goes back into paid employment (keep one or both businesses on the side with that regular income stream, with the potential to building back up to working for yourself full time if you choose to, this is my path because I enjoy business too much to just work a 9-5), both of you go into emplyment, you dramatically and quickly turn around one or both businesses to bring in an income.
Good luck and pm me if I can help more