@May20019 Hang in there! I used Mepitel film during my rad treatment & had to leave it on for 3 weeks after treatment finished as that was when the rad peaked so you may find that your symptoms may hang around for another couple of weeks but we are all different.
Keep up the rest as your body is telling you, you need it but as @primek said, try to do some walking if you feel up to it as exercise will make you feel better mentally & physically.
Dont despair as your body has been through a lot & cancer does test our patience sometimes! Love xx