Stoj,
I think Jerry might have misread your post(?). Maybe he thought the tumor on your tongue was 3cm? I was also a stage III with a T1(1.2cm)N1 (.4mm) MO.
Good luck with all of the treatments. They aren't fun, but you will get through it in one piece. I had my 4 week follow-up today and I can tell you that every day is better than the last.
Good luck and please e-mail me if you have any questions!
Sarah