The sores I can't help you with, I haven't experienced them. But the sleep...
Buddabelly told me about the chamomile tea with honey. It really works. If I drink a cup of the hot tea, I sleep thru the night. I even told my girlfriend at work about it, she is now a believer too. Please try it, see if it will work for you.
Good luck, I hope you get to feeling better soon.