Unfortunately what you described most of us have been thru during our recovery. But, most thats the patients who had chemo. Eating takes so much longer than what it did before cancer. Plus with the patients sense of taste not working it 100% yet, it makes eating a regular balanced meal even more difficult. After many weeks of not having a balanced diet, it might be catching up with you . By now you are probably malnourished and dehydrated. Im not a doctor or medical professional so thats just my guess at whats happening. Im not sure why you have such terrible nausea??? For patients who have had chemo I kinda expect to hear they are having problems with nausea. Since you didnt have chemo its unusual to see patients have nausea as bad as what you are going thru. Im wondering if you have always had a sensitive stomach or if this is only since rads? You should call your treatment facility on Monday and get an appointment to see a nutritionist. They should be able to help you with food options that shouldnt upset your stomach too much. If the nausea meds dont work ask the doc for something else. Maybe another medicine would work better or you could have something unrelated going on like an ulcer or gall bladder problems? Or, maybe its your stomach acid from not eating and drinking enough thats making you feel bad? You have suffered for weeks with this which Im sure is wearing you out. Plus everything you throw up needs to be put back in or this will turn into a viscous cycle of playing catch up that probably will never happen from what you explained. You may also want to consider checking this with your family doc . You may need further testing to get to the bottom of why you are having so many stomach problems. This needs to get figured out and corrected. Its especially troubling since your mouth sores arent as bad and you are even able to swallow pills.

People can go a long time without eating.... up to 3 weeks. As far as surviving without water goes, only 3 days is all someone can last. With not having a balanced diet and not taking in enough calories, you definitely will have other problems like weakness, loss of stamina, irritability, headaches, stomach aches, confusion, etc. But you may also develop far bigger issues like cachexia (muscle wasting), anemia, celiac disease, rickets, diabetes, kidney problems, etc. See the articles below about the seriousness of not eating a balanced diet. Plus your body needs at least 2500 calories with focusing on high protein to heal, if still losing weight on 2500 calories it needs to be upped to 3000 or 3500 calories every single day. Cancer patients in the recovery phase MUST focus on eating as balanced a diet as possible and taking in extra calories to help their body to heal. Without taking in enough, the body will pull what it needs from itself which negatively impacts your muscles, teeth, bones, etc. The recovery phase will be a long, difficult road when patients dont take in enough water and calories (of course as balanced a diet as possible). Inadequate nutrition over an extended period of time can cause serious problems that can last a very long time.

Hope this info helps you. Best wishes with your continued recovery.

Livestrong Diseases caused by poor nutrition

Livestrong, Disease caused by not eating healthy