How other people do it won't necessarily help you as they have different incomings and outgoings.
You need to work on your own circumstances. If you're cutting back on food because you have unsecured debt, you need to get professional help and reframe your thinking - basic living costs come before debt repayments, not after. If you can't buy food, pay your bills and have a small amount to treat yourself and DC, buy clothes as needed etc, you need to reduce the amount you spend on debts.
Even if you aren't in debt, you need to balance your budget. If your income doesn't cover your essentials (mortgage, bills, food, travel to work, DC costs) you need to increase your income and/or reduce your expenses.
Things to consider, whether or not you post the details on here:
Are you receiving all the benefits you're entitled to, eg help with childcare?
Are you entitled to child maintenance and is it being paid?
Are you able to ask for a pay rise, change jobs to earn more money, get a second job or otherwise increase your income?
Is there 'light at the end of the tunnel' eg the amount of childcare you need to pay for will reduce within the next year or two, making things a lot easier? If things are really tough, it might be worth carefully bridging the gap with credit, but only if you can do it at 0% interest and only if you're disciplined enough to only pay for essentials you currently can't afford as you'll have to pay it back and also need to keep up with payments so you can keep getting new 0% deals.
Have you genuinely reduced your bills and other costs to the minimum? I know you say you can't cut back, but different people have different definitions of this, and when you see the numbers, many people are spending more than they need to eg for cars, pay TV, broadband, mobile phone etc - I'm not saying this is you, but it does apply to a lot of people who are struggling to make ends meet, and a few pounds saved on all these things can make a big difference.
Moneysaving Expert will walk you through checking everything:
https://www.moneysavingexpert.com/family/money-help/
But if the above doesn't help then it might be time for a more drastic solution eg is it possible to downsize or move to a cheaper area to reduce your living costs and make your budget work.