It's always your option to get a second medical opinion John. Are you still drinking if I might ask? That won't help any of this of course.
Thing about doctors though is, that 's what there job is - to check you out. Just because the are recommending a test doesn't mean anything is necessarily wrong - they are just trying to get a picture of your health. And unfortunately as we get older, things don't always work as well as the used to - that's just part of life for many of us.