Health care consumers and workers must speak up if some things don't work under the Affordable Care Act, the head of the Nevada State Medical Association said Tuesday.Larry Matheis, state medical association executive director, said the initial years of what many call Obamacare will turn out to be a period of experimentation.“It takes awhile to know what's going to work,” he said of changes under the law. “We all have to live with them and make sure that we blow the whistle when they're not working.”Matheis spoke as part of a public forum put on at the Silver State Charter …