It's seems like over night my dad 86 with prostate cancer and non Hodgkin lymphoma both late stage seems to just be declining. The past few days have been very hard. He has had 3 chemo treaents every 21 days. He now just pees himself in bed dosnt attempt to get up. He has fallen a lot lately I had to shower him today against his wishes cuz I couldn't let him lay in pee. After fresh clothes and clean sheets he does it agin. Also no appitite, had to make him eat a few bites of oatmeal just so he could take his meds. He seems so weak and shaky. Does a person change this much in a short amount if time?