Welcome to OCF! You will find lots of help here with correct medical advice and moral support.

Since you are at almost the half way point, hopefully you are still feeling pretty good. For the mouth sores, thats very common and there isnt much that can be done except rinse several times per day with 1 tsp baking soda, 1 tsp salt and 16 oz warm water. this will help keep the ph balance in your mouth stabilized. Use the magic mouthwash to help numb your mouth for a few minutes. A waterpik used on its lowest setting with warm water and a cap-fulls of non alcohol mouthwash in it helps to keep your mouth extra clean.

Watch closely your intake. this is what will make things easier or harder depending on how well you do with hitting your daily minimums. Every single day from now until at the very least you hit your 1 year post rads anniversary you should push to get the minimums in. That means at least 2500 calories and 48-64 oz of water daily. I know it sounds like alot but its not at all. If you are losing weight or active your calories need to be even higher like 3000 or 3500. After your finish treatments, then ask your doc or dietician about adding some high protein whey powder to your diet. The increased protein helps to speed your healing.

Best wishes!