I know it's tough but get onto the liquid food as soon as. I take a high protein supplement too. I dropped 40 pounds in 2 months for the same reason but to avoid feeding tube you will have to force the calories. I miss MASS protein powder with Natrel milk. About 75 grams of protein and decent calories.
I take tylenol With codeine before eating and magic mouthwash 10 minutes before the get it down.
It gets better. Good thoughts to you.....