Usually 2-3 weeks you begin to climb out of the hole. I just remember I had post nasal drip, and every time it hit the back of my throat it would sizzle... (burn....) like the devil. Then one day I braced myself for the burn and it never happened. Now I was thoroughly blessed - rads was bad but i got through it okay compared to some, and I swallowed - in spite of the pain- through the entire thing. My suggestion start of with something lukewarm, maybe a bit thicker than water. A boost? Smoothie? Protein shake? Small sips see how that goes. Then if it's not bad soft things like scrambled eggs, mashed potatoes or veggies...etc... Stay away from fruit juices and fizzy things for a bit. They'll likely burn. Hugs - congrats on getting through it... And good luck.