I am sorry you have these worries Luckyrose. My thoughts would be as others have said. Ask for a doctor to call ,ringing you before they go, and explain the changes you have seen. When you talk to them ask them to let you know what they think is the problem.
Ring her Social Care services, tell them the doctor is about to see her (I know but you need to put pressure on) and can they arrange an assessment. Ask to have it at a time you can be there. It really doesn't sound as if enough care is going in. Is she drinking enough or getting dehydrated? If you don't know tell them you are concerned that she may be getting dehydrated. My mother has carers three times a day and dehydration and therefore infections are still an issue. Is she eating well and regularly?. If you don't know explain that you are worried she may not be. Explain about the incontinence. I am sorry but if your mother is anything like mine she will deny any problems and tell them she is capable of doing it all by herself. Do not let them accept that in areas where you are concerned. It isn't easy because you will not want to contradict her but they need to know and you need them to know.
Army horses loose on London streets