My mom lost her voice after the third week of radiation and then it came back about two weeks after she finished radiation. Her speech actually sounds better now than it did before she got the radiation.
You can't let the what you should have dones get you down. My moms experience was very similar. Her ENT's theory is save radiation for a recurrance I guess because going through radiation is very tough. Now eight weeks after radiation she is feeling more and more like her old self everyday.
Danielle