This is a double edged sword. Very tough, indeed. Some of us do not know how to seek the help we need. If we cut others off, we must find the inner strength to go it alone. We can come here, we can find ways to strengthen ourself. For me it is CBT, esp. Positive Self-Talk, meditation, exercise, recondition the mind. Trust ourself to soothe ourself.
Caring for your mother is enough. The others need to support you. People here can support you. The beauty of AZ.