She is vomitting green bile today and has eaten/drunk very little for days and felt nauseous for weeks. She has a churning stomach that is very tender and painful and she's extremely weak and shaky with chattering teeth even though she doesn't feel cold. She's 81.
Last Thursday when she slightly less unwell than this, but was feeling desperate, we took her to A&E where they did various tests, which came back normal but because of 'slow movement of stomach gases' seen on an xray, they kept her in overnight. They discharged her the next day with a letter for her GP to request a colonoscopy.
Since then she has deteriated to the point where she can't keep food down and (please re-read first sentence at this point - Mobius loop of old age, perhaps!).
My sister called the GP out today and said she and mum were at end of their tethers and whatever is wrong with mum's stomach needed to be looked into with her as an in patient as she is getting very weak. GP was eventually persuaded 
and told my sister to collect a letter from the surgery this afternoon. BUT GP has just called to say he won't admit her, but will come round tonight at 8 with an anti nausea injection and discuss things then.
We feel that he is not doing enough. Any medics have an opinion on this?