Hi Jennel,
I'm sure you'll get tons of responses but one thing to keep in mind is the recovery from the chemo and radiation is a long rough road. My mom was very depressed for a time and now finally almost 7 months post radiation she is really starting to feel more like herself. It is very difficult for us to see our parents suffer and watching my mom go through all this was by far the most difficult thing I've ever had to do in my entire 35 years of life.
Right now your dad is bascially at the turning point where things should start to get better. I think for most people going through it the last week and the first 3-4 weeks after treatment were the worst.
Please let me know if there is anything that I can do to help. I'll be keeping your family in my prayers.
Dani