You could begin another thread.
Also, speak to someone at AgeUK? Is there a District Nurse you could ask? Or a local carers/Alzehimers Group?
Charlotte: Or speak with your Mum's GP? It is difficult for them to accept advice from their children, which we remain until they die. When I step into Mum's back door I am immediately the 'child' again …… she sorted out help with care whilst bathing herself, without any input: surprisingly

: from me.
You could ask what advice your Mum would give a friend in a similar situation, which is kind of sideways. She might give a clue as to how she sees her state. Whereas mine would probably tell me "I don't give advice Dear" or "That's nothing to do with me, Dear"

Charlotte - how old is your Mum? How fragile is she really? My advice for anyone being shouted at for trying to help, if their relative is generally well and managing: "They are a Big Girl/Boy now, point out that the GP wouldn't prescribe without necessity but of course, it's up to you now that you have the advice!"
Charlotte: do you have Power of Attorney or such? 'abuse' of course is a modern word

-
poking your nose in is the more familiar from way back.
Let us know how you get on but do begin a separate thread. I would start with your Mum's GP.