I'm just ending my treatment of xeloda & radiation for rectal cancer, well, I have 3 treatments left. As for the radiation, I didn't start seeing any side effects until I was about 15 days into it. If you want details of what I'm experiencing, let me know and I'll give you my email and we can talk privately about it.
As for the xeloda, they have me on 3 pills (500mg) in the morning and 3 pills after dinner. I started feeling very nauseated the first night after taking my 3 morning pills. They had prescribed Regiland for the nausea, but it didn't work, it just made me feel worse. After 3 days, I had lost 7 pounds from not being able to drink or eat and they then put me on Zolfran, which worked wonderfully. I started using the udder cream right away for my hands and feet (I'd put it on in the morning and at night before I went to bed) and never had any problem with that. I faithfully rinse my mouth 3 to 4 times a day with baking soda and cold water and never got any mouth sores either.
I hope this helps, I know it's a scarey thing not knowing what your going to be going through. I'm in the same boat.