new member

i am a new member to this site. i am the caregiver to my mother, who has just had surgery to remove vulvar cancer. she is now being sent for mri of pelvic for continuing pain, searching for metases or nodules.
i am an only child & my mother is a very difficult person to be with. she does not take meds as she should & argues with me about it constantly. i need help in dealing with her. has anyone else had a difficult loved one to take care of & survived? please help.