Congratulations on finishing your radiation, Colin!
I know what a great feeling it is to be done with that since I had Medulloblastoma when I was 13. I had 6 weeks of radiation and 9 months of chemotherapy after my surgery. It was really difficult, but I made it through with positive thinking and an extreme amount of love and support from my friends and family. I am 35 years old now.
I can tell you have tons of people who love and care for you, and I know you will make it through this ordeal with flying colors.
I'm praying for you, buddy!