I agree with the poster who says you need to maximise income, not just cut costs.
I realise you are pregnant but if you could really get the hang of ebay, for example, you could offer to sell stuff for others in your circle of friends/clients who don't have the time or know-how, taking a small fee or a percentage of the sales price as commission for your part.
You could also sell a few of your own big things bought in better times, and replace them with a Freecycle equivalent. Things like 1930s dressing tables and G-Plan dining tables and cabinets are very sought after. Email pictures to a midcentury dealer like The Old Cinema and see if they'd be interested. They buy a good amount.
When you are on maternity leave after the baby, you could go to car boot sales with the baby, and pick up ephemera to re-sell on Ebay or even directly to specialist dealers. There is a massive collectibles market for all kinds of things - old cameras, tin signs, old Ladybird books, Enid Blyton, Chalet School, comics and so on. If you put together a small ready-made collection yourself, there is a premium value.
People who are working are spending more time at work than ever before so could you offer services such as ironing (which you can do sitting down by putting the board on its lowest ratchet)? Advertise in an office - if the workers have a formal dress code they'll get through at least five shirts a week, so that's a tenner per person.
Can you make cushions? Put a note through doors offering to make bespoke cushions if the customer supplies the fabric - no start up costs for you. You can also buy remnants of designer fabrics at the Curtain Factory Outlet, make them into cushions, and then sell them on Ebay or Etsy as Designer's Guild, Romo, Jane Churchill,Laura Ashley, Cath Kidston and so on.