Hi Mariam
sounds like everything is going pretty much as expected.I too found ordinary things irritated the hell out of me,i always felt like screaming who the hell cares MY HUSBAND HAS MOUTH CANCER.You do become totally bound up in the whole thing,and life passes you by and you dont even notice.
In our case the throat thing got gradually worse until some time after treatment finished,the rads burns were the same,
Robs tube feeds contained fibre so he went to the toilet every day with the aid of 15 mls of liquid lactulose every morning for the morphine constipation.
I cleaned,the peg tube site every day with surgical wipes,and unclipped the tube and deep cleaned round the hole once a week.
Any temprature over 99 should be recorded and treated with some sort of anti pyretic ie panadol or neurofen and if it persists for more than 24 hours see the doctor.
Keep up the good work
love liz