I can relate to your experience. The radiation treatments were by far the worst for me. Like you, I started getting thick mucus about midway through the treatment schedule. I ended up being unable to eat or drink without coughing or choking. I had to sleep sitting up to get any sleep at all. I lost 40 pounds and ended up getting a feeding tube (best decision I made by the way). My blood work was so bad I missed chemo and radiation treatments. I did not want to go on either. Sound familiar? Guess what, IT WILL GET BETTER. There is light at the end of the tunnel. Please, please, please hang in there!! Do it for yourself and your loved ones. The end result for me was that I am now cancer free! The pain was worth it to save my life. I believe your life is just as valuable. The severe side effects will subside in a month or so. I am six months out and I am back to almost normal. And most importantly, I am alive! I hope this note gives you some measure of hope and encouragement. Stay strong!!