@cathy58. after reading your main post a few times i had a feeling it might be COPD/Emphysema. that's why the oxygen. i will offer this advice. please consult with your doctor about how bad this is. only then will you be able to make an informed decision about driving. i'm sorry but this is to important for you not to do so. you say you're a grandmother. first think of yourself. family, and grandkids. put all of this into your decision making. is it worth the loss of life or independence. it's a tough choice.