I also know what you are going through. We found out the my mom who is 54 has stage 4 lung cancer (she has never smoked in her life). It has been about two months since we were told but in that time she has had major back surgery to correct the damage done to her spine by a tumor, and today she will finsh up the 15 rounds of radiation. Yes it is so hard to see her at home and always tired with no engery that just is not her. But not that she is done with radition she will have a two week break before chemo. All i can say is stay strong you have been dealing with it longer then me so you know that but it seems so hard and i can not imagaine how i will feel if her health fades anymore.