radiation sunburn

I am having great dryness and extreme itching where only a Percocet medication gives me relief along with Aquaphor cream .

I have tried many applications of the cream and protecting myself from the sun and it has just begun to clear somewhat. How long is it going to last and will my skin leave me with permanent roughness? How do you control the itching?

along with the oral yeast infection that is now under medication Diflucan I have very thick mucus that is coughed up frequently. Is there anything that will make the mucus thinner and how long will it last?