Bravo to you Chris, being halfway through treatment is a real milepost. Remember to rest as much as you can and take in as many fluids as possible. There will be rough days ahead, but as surely as the last three weeks went by..so will they. Don't forget that these rads are cumulative. They give you a little bonus of extra misery after they're complete.
Keep on writing and let us help you mark your ups as well as the downs. It's all part of the journey to victory.
All the best to you,
Fran