Donna - along with going to your Dr and getting some help there, perhaps you should share with some of your family the fact that you are stressed and feeling very worried about your mother, and there are some things they can do to help you and alleviate some of this - like your Nana leaving the dog at home when she visits, and your children pitching in a little more. You may have already said something, but I know from experience that I often silently seethe about things, but if I diplomatically talk to the person about it, it often helps...