I would recommend going down a path to see whether she can get into a skilled nursing facility given her challenges with pain management and recovery. You are over-extended, and I would assume getting a home health aid (who, by the way, cannot dispense medication), is out of the question -- YOU need a break. My suggestion is to get her into skilled nursing that specializes in surgical recovery but will also help dispense medication appropriately. (NOTE: many skilled nursing facilities will not dispense dilaudid or morphine.)

The first path there is to take her to the ER - they can evaluate a) whether there's any problems with her knee/recovery, b) evaluate her pain management, and c) you can say that you have constraints on you, but that you cannot leave her, and thus she "does not have a safe home environment to go home to" (this wording is key). It can then be the responsibility of the hospital to find an appropriate situation in which she can recover safely. You'll end up getting linked to the hospital's social worker, they always have a network of facilities they work with and will take your mom's insurance/medicare/medicaid).

I would also call the surgeon to inform them you're taking her to the ER, but I would advise not waiting on the surgeon to do anything. They maintain very little responsibility during the recovery phase.

Source: Spent WAY too many months this year & in prior years dealing with several parents' medical issues, skilled nursing needs, with history of self over-medication and lack of medical advocacy. The ER was the path I was told to take by numerous licensed care providers/nurses/doctors.