Are you in London?
800 Tesco stores have a small display with a selection of free fruit on it everyday (intended for children to eat while they’re in the store), and there’s no obligation to buy anything. If you have a store that offers this within walking distance, you could visit each day if possible and pick up a piece of fruit.
Lots of food is cooked everyday in Sikh Gurdwaras (Temples), and absolutely everyone is welcome to visit and eat a meal for free (this is the reason for the food being cooked). If there’s one near to you, phone them and enquire.
If you buy 2x6 pints of milk in Tesco, it costs £3.00, and you’ll have 4 pints of milk remaining. If you have some rice at home, you could make some rice puddings. You could also buy some fine vermicelli (around 40p per packet) in Tesco Asian food section, and make ‘semia.’ It’s a vermicelli-based milk pudding. I usually use 4 pints of milk, a few knobs of butter, 3-4 Tbs sugar and about 1/4 pack of vermicelli. You can find recipes online (some people add dried fruit and/or nuts, but we only use the ingredients I mentioned previously and a few green cardamoms thrown in). It’s still good without the cardamoms. It’s a really simple recipe.
You could also make porridge with the leftover milk, and buy a bag of oats relatively inexpensively.
I would also definitely contact your local food bank, even if you think that you have enough supplies. It would give you a bit of extra peace of mind I think, to know that you have a little bit of extra food in your cupboards. They can also provide nappies, sanitary products and some toiletries. I think you can get a referral from your GP or Jobcentre, but I’m not entirely sure.
I’m sorry to hear of your situation, and I wish you all the very best.