Judy, I'm sorry to hear all you're going through. I understand what it is to care for a sick parent. My father is gone now, and I know I should be more grateful that Ma is doing as well as she is (She just had her 83rd birthday this past week) instead of focusing on the ways she isn't (she has Alzheimer's).
And as for your pain issues, I hope you know you have my empathy. As Mother Teresa is credited with muttering, "I know God won't give me more than I can handle, but I wish he didn't trust me so much."
Blessings.
Peace & Love,
Sugah