bumble, sorry you are feeling sad today. I recall my DMum talking to me about they early days of her marriage to my DDad when they had very little money and had to make a little go a very long way. She used to make vegetable casseroles bulked out with tinned tomatoes. Also, huge vats of soups made with the chicken carcass (when they could afford one: roast, cold meat, stock for soup plus bits of meat from bones) and lots of veggies. Wherever you shop, try to find out when they do their reductions - I assume it will be broadly the same whatever the supermarket, so try to go when: it is raining, football/bug sports game is on, near closing on Sunday. I know this doesn't help much now but if you stretch what you have as much as possible then it may last a little longer.
As an aside butcher will often sell chicken carcasses cheaply - they are called 'frames'. You could use these to make stock (excellent for risotto) and soup. They will also sell beef bones cheaply - these can make beef broth which you can use for the base of soups and also reheat with a handful of v small pasta and you have minestra - a lovely light broth.
I make my own bread (in the breadmaker 
) and make most things from scratch. That way I can control what goes in it and also it's cheaper in the long run. I also used to buy multipack of crisps until I realised that they were being munched with abandon in a very careless way, with regards to how many were being eaten. So I stopped buying them. Yes, there was a small cry of "where are the crisps" but, tbh, it was short lived. Now I buy large bags now and again and eke them out by putting some in a bowl and putting the bag away.
As spew said - not preaching but just a few ideas to make your food go further for less.
spew, well done for checking.
Today has been a NSD - due mainly to the rain and a triple bill of rugby which has kept me glued to the tv most of the day.
Have made some no wheat muffins (for me) and coffee kisses (for DS and DH - who mutiny if there is no dessert ).