Mum's chronic pain

Hiya all, I'm Heather. I'm coming on here to ask how to help my mother. She's 46 (December 25th, 1979) and female. Unsure about her height and weight I'm afraid, if I were to give an estimate I'd say 5'11 and in the 200-250 lbs range. She vapes and is also on Mirtazapine and Sertraline, but that's about it. We're British and live in England. I'd like to apologize in advance as I'm not the smartest, so I may not refer to things correctly.

In the early 2020s, she slipped on our kitchen floor and ended up breaking something in her lower back/rear. Unsure what, I can ask if need be. However, ever since then, she seems to be having non-stop problems. She's described it to me recently, that it's a slipped lower disc that's pressing on the nerves? Something along those lines. Currently, she's in pure agony and is incapable of walking for more than five minutes, let alone standing. Even sat down she can't get comfortable and is still in pain. Our doctors have prescribed her a multitude of painkillers, one of which I know is morphine, all of which aren't working or only do so for an hour maximum. She also went for an MRI scan earlier this week, yet the hospital are taking forever to give her results (they promised they'd call Thursday, however such didn't happen) and she only seems to be worsening in the meantime. If any more information is needed, I can provide such. I'd also like to state that, as much as I love my mother, she is quite stubborn and will put off going to any emergency services, not wanting to waste other people's time. Yet, if I can take her pain away in any way, I don't care what I have to do.