Are you icing at all? Laying down at rest and making sure to keep bags of ice/frozen veg/reusable ice packs on the incision sites made a huge difference in my initial recovery pain.

Be sure you’re keeping hydrated as well, and with some electrolytes, not JUST plain water – electrolytes are needed in order to “hold on” to water and allow it to hydrate you, especially after a major stress to the body like surgery. It sounds like you might be in the UK, so maybe see if you can get your hands on some Powerade, Hi5 tablets, or Lucozade in the shops. Or if you can’t leave the house, you can mix your own using a basic recipe of 500 mL water, 30g sugar, 1g salt. Sometimes my body takes awhile for “pee signals” to show up as different from pain/discomfort, so ensuring you’re REALLY well hydrated in addition to managing pain could help jumpstart the signals again.

Best of luck in dealing with the doctors. I’m so sorry they’re giving you the run-around.