I had this problem years ago and decided Wednesday is MY day, I did only what was necessary for the good of the family and the rest could wait for another day.
Set a day for yourself, do what you want to do, and you will find you can handle the rest of your life
At that time, I too was visiting my mother 50 miles away once or twice a week, had to shorten that to once a week.
Others were caring for her when I wasn't there.
Take time for yourself and don't feel guilty, you owe it to yourself.
Carol J.