Hi Max. My husband completed radiation at the end of February (no chemo)he was nauseated and vomited all the time. Doctors told him the same thing, can't be from radiation, but all the same he was sick and needed to take medication for it. He is now 2 months post treatment and still has times when he is sick and vomits. Not often, but at times. My husband also had trouble sleeping and was on Ambien and tried Lunesta also. I think that goes with the territory. He is now sleeping much better, although he still takes a sleeping aid from time to time. Hang in there. Don't give up. I had to beg and plead with my husband to continue treatments sometime and now he is so glad he did. Boy you sure sound just like him! It will get better!