I am really sorry to hear what you are going through. I sincerely hope everything goes well for you and you can beat it.
Two and a half years ago, my younger brother (Jada2001Retro on here) was diagnosed with Stage 2 Hodgkins Lymphoma and was able to beat it. I know exactly what you must be going through with the chemo and radiation. It hurt like hell to see my brother in the state he was in, but being there for him and supporting him seemed to always make him feel better.
I wish you all the best man. If you need to talk to someone about it, don't hesitate to PM him. He was able to get all sorts of help from different foundations and charities and got alot of good information from his doctors.
Just keep your head up and have faith. Prayers will def be sent your way.