mother's sickness

Mother still doesn't feel well, feel sick and cannot eat well. Her doctor ordered her to go to the big hospital for examination, she says she'll call the hospital tomorrow morning. I worry about her, though she's fit for her age still she is an old woman. Also, her disorder tells me that how I owe my daily life to her - having a home manager during my absence is quite relief, it makes me be able to concentrate in my job or other things. I hope her disorder would not be serious.